Scientific Commons: T. Schörner-Sadenius

Measurement of $\alpha_{s}$ with Radiative Hadronic Events (2009)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Hadronic final states with a hard isolated photon are studied using data taken at centre-of-mass energies around the mass of the Z0 boson with the OPAL detector at LEP. The strong coupling alpha S is...

Search for events with an isolated lepton and missing transverse momentum (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of Beauty Production from Dimuon Events at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Production of excited charm and charm-strange mesons at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Exclusive Photoproduction of Υ Mesons at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Deep Inelastic Scattering with Leading Protons or Large Rapidity Gaps at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of the Longitudinal Proton Structure Function at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Measurement of the charm fragmentation function in D* photoproduction at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

2. WG: Multi-jet Final States and Energy Flows, Introduction 2008-05-26 - 2008-05-30 (2009)

C. Gwenlan, DESY Forschung Hochenergiephysik, L. Lönnblad, E. Rodrigues, G. Zanderighi, ...

Contribution to a conf. proceeding (book/online)

HERA Results 2008-05-26 - 2008-05-30 (2009)

K. Müller, DESY Forschung Hochenergiephysik, H. Perrey, T. Schörner-Sadenius

Contribution to a conf. proceeding (book/online)

Measurement of Charm and Beauty Production in Deep Inelastic ep Scattering from Decays into Muons at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Scaled Momentum Distributions of Charged Particles in Dijet Photoproduction at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

A Measurement of the Q2, W and t Dependences of Deeply Virtual Compton Scattering at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Multi-lepton production at high transverse momentum at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, ...

Internal report | Preprint

Measurement of J/ψ helicity distributions in inelastic photoproduction at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, ...

Internal report | Preprint

Measurement of Charged Current Deep Inelastic Scattering Cross Sections with a Longitudinally Polarised Electron Beam at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Scaled Momentum Distributions of Charged Particles in Dijet Photoproduction at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of High-Q2 Neutral Current Deep Inelastic e−p Scattering Cross Sections with a Longitudinally Polarised Electron Beam at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Multi-Leptons with High Transverse Momentum at HERA (2009)

F.D. Aaron, DESY Forschung Hochenergiephysik, H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, ...

Internal report | Preprint

Measurement of D± and D0 Production in Deep Inelastic Scattering Using a Lifetime Tag at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Multi-Leptons with High Transverse Momentum at HERA (2009)

F.D. Aaron, DESY Forschung Hochenergiephysik, H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, ...

Internal report | Preprint

Measurement of J/ψ photoproduction at large momentum transfer at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, ...

Internal report | Preprint

Measurement of dijet photoproduction for events with a leading neutron at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, ...

Internal report | Preprint

Measurement of isolated photon production in deep inelastic ep scattering (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, ...

Internal report | Preprint

Multi-lepton production at high transverse momentum at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, ...

Journal article

Multi-Leptons with High Transverse Momentum at HERA (2009)

F.D. Aaron, DESY Forschung Hochenergiephysik, H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, ...

Journal article

Subjet Distributions in Deep Inelastic Scattering at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Exclusive Photoproduction of Υ Mesons at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of the Longitudinal Proton Structure Function at HERA (2009)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Events with an Isolated Lepton and Missing Transverse Momentum Measurement of W Production at HERA (2009)

F.D. Aaron, DESY Forschung Hochenergiephysik, H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, ...

Internal report | Preprint

Search for Charged Higgs Bosos in $e^{+}e^{-}$ Collisions at $\sqrt{s}$ = 189-209 GeV (2008)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

A search is made for charged Higgs bosons predicted by Two-Higgs-Doublet extensions of the Standard Model (2HDM) using electron-positron collision data collected by the OPAL experiment at...

Search for Charged Higgs Bosos in e+e- Collisions at sqrts(s) = 189-209 GeV (2008)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

A search is made for charged Higgs bosons predicted by Two-Higgs-Doublet extensions of the Standard Model (2HDM) using electron-positron collision data collected by the OPAL experiment at...

Three- and Four-Jet Final States in Photoproduction at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Deep inelastic inclusive and diffractive scattering at Q2 values from 25 to 320 GeV2 with the ZEUS forward plug calorimeter (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Internal report | Preprint

Multi-jet cross sections in charged current e±p scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Energy Dependence of the Charged Multiplicity in Deep Inelastic Scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

K0_SK0_S resonance production in ep collisions at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Beauty photoproduction using decays into electrons at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Search for events with an isolated lepton and missing transverse momentum and a measurement of W production at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Production of excited charm and charm-strange mesons at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Diffractive Photoproduction of Dijets in ep Collisions at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Angular correlations in three-jet events in ep collisions at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Deep inelastic inclusive and diffractive scattering at Q2 values from 25 to 320 GeV2 with the ZEUS forward plug calorimeter (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

K0SK0S resonance production in ep collisions at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Beauty photoproduction using decays into electrons at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of Beauty Production from Dimuon Events at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

What HERA may provide? 2008-04-07 - 2008-04-11 (2008)

H. Jung, A. De Roeck, J. Bartels, O. Behnke, ...

Contribution to a conf. proceeding (book/online)

Leading Proton Production in Deep Inelastic Scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

A Measurement of the Q2, W and t Dependences of Deeply Virtual Compton Scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Leading Proton Production in Deep Inelastic Scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Subjet Distributions in Deep Inelastic Scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Measurement of Charged Current Deep Inelastic Scattering Cross Sections with a Longitudinally Polarised Electron Beam at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Measurement of D± and D0 Production in Deep Inelastic Scattering Using a Lifetime Tag at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Measurement of High-Q2 Neutral Current Deep Inelastic e−p Scattering Cross Sections with a Longitudinally Polarised Electron Beam at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Energy Dependence of the Charged Multiplicity in Deep Inelastic Scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of the charm fragmentation function in D* photoproduction at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Measurement of Beauty Photoproduction using Decays into Muons in Dijet Events at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Deep Inelastic Scattering with Leading Protons or Large Rapidity Gaps at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Internal report | Preprint

Multi-jet cross sections in charged current e±p scattering at HERA (2008)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of the $e^+ e^- \to W^+ W^-$ cross section and W decay branching fractions at LEP (2007)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

From a total data sample of 701.1 pb^-1 recorded with e+e- centre-of-mass energies of sqrt = 161-209 GeV with the OPAL detector at LEP, 11693 W-pair candidate events are selected. These data are used...

Bose-Einstein study of position-momentum correlations of charged pions in hadronic Z0 decays (2007)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

A study of Bose-Einstein correlations in pairs of identically charged pions produced in e+e- annihilations at the Z0 peak has been performed for the first time assuming a non-static emitting source....

Search for invisibly decaying Higgs bosons in $e+e- \to Zoho$ production at $\sqrt{s}$ = 183 - 209 GeV (2007)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Zo boson in e+e- collisions at energies between 183 and 209 GeV. The search is based on...

Search for Dirac Magnetic Monopoles in $e^{+}e^{-}$ Collisions with the OPAL Detector at LEP2 (2007)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

This letter describes a direct search for pair produced magnetic monopoles in e+e- collisions. The analysis is based on 62.7 pb^-1 of data collected with the OPAL detector at an average...

Inclusive Jet Production in Photon-Photon Collisions at $\sqrt{^{s}ee}$ from 189 to 209 GeV (2007)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Inclusive jet production (e+e- -> e+e- +jet+X) is studied in collisions of quasi-real photons radiated by the LEP beams at e+e- centre-of-mass energies sqrt see from 189 to 209 GeV. Jets are...

Photoproduction of events with rapidity gaps between jets at HERA (2007)

Chekanov, S., Derrick, M., Magill, S., Miglioranzi, S., Musgrave, B., Nicholass, D., ...

The photoproduction of dijet events, where the two jets with the highest transverse energy are separated by a large gap in pseudorapidity, have been studied with the ZEUS detector using an integrated...

Three- and Four-Jet Final States in Photoproduction at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Internal report | Preprint

Forward-Jet Production in Deep Inelastic ep Scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Leading Neutron Energy and PT Distributions in Deep Inelastic Scattering and Photoproduction at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Dijet Production in Diffractive Deep Inelastic Scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Measurement of (Anti)Deuteron and (Anti)Proton Production in DIS at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Multijet production at low xBj in deep inelastic scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Diffractive Photoproduction of D*±(2010) at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Measurement of D Mesons Production in Deep Inelastic Scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Internal report | Preprint

Diffractive Photoproduction of D*±(2010) at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Measurement of D*± Meson Production in e±p Scattering at Low Q2 (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Jet Cross-Sections and αs in DIS at HERA 2007-04-16 - 2007-04-20 (2007)

T. Schörner-Sadenius, DESY Forschung Hochenergiephysik

Contribution to a conf. proceeding (book/online)

Exclusive ρ 0 Production in Deep Inelastic Scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Internal report | Preprint

Diffractive Photoproduction of Dijets in ep Collisions at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Internal report | Preprint

Bose-Einstein Correlations of Charged and Neutral Kaons in Deep Inelastic Scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

High-ET dijet photoproduction at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Measurement of K0s, Lambda, Antilambda Production at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Multi-jet cross sections in charged current e±p scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, P.D. Allfrey, ...

Journal article

Measurement of D Mesons Production in Deep Inelastic Scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Exclusive ρ 0 Production in Deep Inelastic Scattering at HERA (2007)

H. Abramowicz, DESY Forschung Hochenergiephysik, I. Abt, L. Adamczyk, M. Adamus, V. Adler, ...

Journal article

Inclusive Production of Charged Hadrons in Photon-Photon Collisions (2006)

Abbiendi, G, Åkesson, P F, De Roeck, A, Zivkovic, L, Zer-Zion, D, Yamashita, S, ...

The inclusive production of charged hadrons in the collisions of quasi-real photons e+e- -> e+e- +X has been measured using the OPAL detector at LEP. The data were taken at e+e- centre-of-mass...

Inclusive Production of Charged Hadrons in Photon-Photon Collisions (2006)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K, ...

The inclusive production of charged hadrons in the collisions of quasi-real photons e+e- -> e+e- +X has been measured using the OPAL detector at LEP. The data were taken at e+e- centre-of-mass...

Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP (2006)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

This paper describes a topological search for an invisibly decaying Higgs boson,H, produced via the Bjorken process (e+e- -> HZ). The analysis is based on data recorded using the OPAL detector at LEP...

QCD coherence and correlations of particles with restricted momenta in hadronic Z decays (2006)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

QCD coherence effects are studied based on measurements of correlations of particles with either restricted transverse momenta, pT

QCD coherence and correlations of particles with restricted momenta in hadronic Z decays (2006)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

QCD coherence effects are studied based on measurements of correlations of particles with either restricted transverse momenta, pT

Precision Electroweak Measurements on the Z Resonance (2006)

Schael, S, Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, ...

We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17...

Precision Electroweak Measurements on the Z Resonance (2006)

Schael, S, Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, ...

We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17...

Search for Neutral MSSM Higgs Bosons at LEP (2006)

Schael, S, Zivkovic, L, Achard, P, Adriani, O, Aguilar-Benítez, M, Alcaraz, J, ...

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four...

Search for Neutral MSSM Higgs Bosons at LEP (2006)

Schael, S, Achard, P, Adriani, O, Aguilar-Benítez, M, Alcaraz, J, Alemanni, G, ...

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four...

Measurement of the strong coupling $\alpha^{s}$ from four-jet observables in $e^{+}e^{-}$ annihilation (2006)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Data from e+e- annihilation into hadrons at centre-of-mass energies between 91 GeV and 209 GeV collected with the OPAL detector at LEP, are used to study the four-jet rate as a function of the Durham...

Measurement of the strong coupling $\alpha^{s}$ from four-jet observables in $e^{+}e^{-}$ annihilation (2006)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Data from e+e- annihilation into hadrons at centre-of-mass energies between 91 GeV and 209 GeV collected with the OPAL detector at LEP, are used to study the four-jet rate as a function of the Durham...

Search for neutral MSSM Higgs bosons (2006)

Achard, P., Adriani, O., Aguilar-Benítez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four...

Search for neutral MSSM Higgs bosons (2006)

Achard, P., Adriani, O., Aguilar-Benítez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four...

Search for neutral MSSM Higgs bosons at LEP (2006)

Achard, P., Adriani, O., Aguilar-Benítez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four...

Verstehen wir die starke Kraft? (2006)

R. Klanner, DESY Forschung Hochenergiephysik, T. Schörner-Sadenius

Journal article

HERA and the LHC - A workshop on the implications of HERA for LHC physics: Proceedings Part A (2006)

S. Alekhin, DESY Forschung Hochenergiephysik, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, ...

Internal report | Preprint

HERA and the LHC - A Workshop on the Implications of HERA for LHC Physics: Proceedings Part B. (2006)

S. Alekhin, DESY Forschung Hochenergiephysik, G. Altarelli, N. Amapane, J. Andersen, V. Andreev, ...

Internal report | Preprint

Search for neutral MSSM Higgs bosons at LEP (2006)

Achard, P., Adriani, O., Aguilar-Benítez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four...

Search for neutral MSSM Higgs bosons at LEP (2006)

Achard, P., Adriani, O., Aguilar-Benítez, M., Alcaraz, J., Alemanni, G., Allaby, J., ...

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four...

Jets in ep and \gamma p Scattering at HERA (2005)

Schörner-Sadenius, T

Recent jet physics results from ep and $\gamma$p scattering at HERA will be reviewed covering cross-section measurements, the extraction of QCD parameters, the transition region from photoproduction...

Colour reconnection in $e^{+}e^{-}\to W^{+}W^{-}$ at $\sqrt{s}$ = 189 - 209 GeV$ (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

The effects of the final state interaction phenomenon known as colour reconnection are investigated at centre-of-mass energies in the range $\sqrt{s}~ 189-209 GeV using the OPAL detector at LEP....

Measurement of the mass and width of the W boson (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

The mass and width of the W boson are measured using e+e- -> W+W- events from the data sample collected by the OPAL experiment at LEP at centre-of-mass energies between 170 GeV and 209 GeV. The mass...

Searches for Gauge-Mediated Supersymmetry Breaking Topologies in $e^{+}e^{-}$ collisions at LEP2 (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Searches were performed for topologies predicted by gauge-mediated Supersymmetry breaking models (GMSB). All possible lifetimes of the next-to-lightest SUSY particle (NLSP), either the lightest...

Searches for Gauge-Mediated Supersymmetry Breaking Topologies in $e^{+}e^{-}$ collisions at LEP2 (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Searches were performed for topologies predicted by gauge-mediated Supersymmetry breaking models (GMSB). All possible lifetimes of the next-to-lightest SUSY particle (NLSP), either the lightest...

Determination of $\alpha_{s}$ using Jet Rates at LEP with the OPAL detector (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Hadronic events produced in e+e- collisions by the LEP collider and recorded by the OPAL detector were used to form distributions based on the number of reconstructed jets. The data were collected...

Determination of $\alpha_{s}$ using Jet Rates at LEP with the OPAL detector (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Hadronic events produced in e+e- collisions by the LEP collider and recorded by the OPAL detector were used to form distributions based on the number of reconstructed jets. The data were collected...

Measurement of Isolated Prompt Photon Production in Photon-Photon Collisions at $\sqrt{s}_{ee}$=183-209 GeV (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

For the first time at LEP the production of prompt photons is studied in the collisions of quasi-real photons using the OPAL data taken at e+e- centre-of-mass energies between 183 GeV and 209 GeV....

Measurement of the running of the QED coupling in small-angle Bhabha scattering at LEP (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Using the OPAL detector at LEP, the running of the effective QED coupling alpha(t) is measured for space-like momentum transfer through its effect on the angular spectrum of small-angle Bhabha...

Measurement of the running of the QED coupling in small-angle Bhabha scattering at LEP (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Anagnostou, G, Anderson, K J, ...

Using the OPAL detector at LEP, the running of the effective QED coupling alpha(t) is measured for space-like momentum transfer through its effect on the angular spectrum of small-angle Bhabha...

Study of Z Pair Production and Anomalous Couplings in $e^+ e^-$ Collisions at $\sqrt{s}$ between 190 GeV and 209 GeV (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A study of Z-boson pair production in e+e- annihilation at center-of-mass energies between 190 GeV and 209 GeV is reported. Final states containing only leptons, (l+l-l+l- and l+l-nn), quark and...

Study of Z Pair Production and Anomalous Couplings in $e^+ e^-$ Collisions at $\sqrt{s}$ between 190 GeV and 209 GeV (2005)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A study of Z-boson pair production in e+e- annihilation at center-of-mass energies between 190 GeV and 209 GeV is reported. Final states containing only leptons, (l+l-l+l- and l+l-nn), quark and...

Measurement of event shape distributions and moments in $e^{+}e^{-} \to$ hadrons at 91-209 GeV and a determination of $\alpha_{s}$ (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

We have studied hadronic events from e+e- annihilation data at centre-of-mass energies from 91 to 209 GeV. We present distributions of event shape observables and their moments at each energy and...

Measurement of $R_b$ in $e^+ e^-$ Collisions at 182 - 209 GeV (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Measurements of Rb, the ratio of the bbbar cross-section to the qqbar cross- section in e+e- collisions, are presented. The data were collected by the OPAL experiment at LEP at centre-of-mass...

Search for Radions at LEP2 (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A new scalar resonance, called the radion, with couplings to fermions and bosons similar to those of the Higgs boson, is predicted in the framework of Randall-Sundrum models, proposed solutions to...

Determination of the LEP Beam Energy using Radiative Fermion-pair Events, 2004 (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

We present a determination of the LEP beam energy using "radiative return" fermion-pair events recorded at centre-of-mass energies from 183 GeV to 209 GeV. We find no evidence of a disagreement...

Flavour Independent $h^{0}A^{0}$ Search and Two Higgs Doublet Model Interpretation of Neutral Higgs Boson Searches at LEP (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Upper limits on the cross-section of the pair-production process e+e- -> h0A0 assuming 100% decays into hadrons, are derived from a new search for the h0A0 -> hadrons topology, independent of the...

Multi-Photon Events with Large Missing Energy in $e^{+}e^{-}$ Collisions at $\sqrt{s}=192-209 GeV$ (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 - 209 GeV using the...

A Step Towards A Computing Grid For The LHC Experiments: ATLAS Data Challenge 1 (2004)

Sturrock, R, Bischof, R, Epp, B, Ghete, V M, Kuhn, D, Mello, A G, ...

The ATLAS Collaboration at CERN is preparing for the data taking and analysis at the LHC that will start in 2007. Therefore, a series of Data Challenges was started in 2002 whose goals are the...

Search for neutral Higgs bosons in CP-conserving and CP-violating MSSM scenarios (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

This report summarizes the final results from the OPAL collaboration on searches for neutral Higgs bosons predicted by the Minimal Supersymmetric Standard Model (MSSM). CP-conserving and for the...

Scaling violations of quark and gluon jet fragmentation functions in $e^{+}e{-}$ annihilations at $\sqrt{s}$ = 91.2 and 183-209 GeV (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Flavour inclusive, udsc and b fragmentation functions in unbiased jets, and flavour inclusive, udsc, b and gluon fragmentation functions in biased jets are measured in e+e- annihilations from data...

Measurement of the Strange Spectral Function in Hadronic $\tau$ Decays (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Tau Lepton decays with open strangeness in the final state are measured with the OPAL detector at LEP to determine the strange hadronic spectral function of the tau lepton. The decays tau- ->...

Study of Bose-Einstein Correlations in $e^{+}e^{-}\to W^{+}W^{-}$ events at LEP (2004)

Abbiendi, G, Ainsley, C, Åkesson, T, Alexander, G, Allison, J, Amaral, P, ...

Bose-Einstein correlation between like-sign charged-particle pairs in e+e- -> W+W- events recorded with the OPAL detector at LEP at centre-of-mass energies between 183 GeV and 209 GeV are studied....

Constraints on Anomalous Quartic Gauge Boson Couplings from $\nu\overline{\nu}\gamma\gamma$ and $q\overline{q}\gamma\gamma$ events at LEP 2 (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Anomalous quartic couplings between the electroweak gauge bosons may contribute to the vv gamma gamma and qq gamma gamma final states produced in e+e- collisions. This analysis uses the LEP2 OPAL...

Search for Chargino and Neutralino Production at $\sqrt{s}$ = 192-209 GeV at LEP (2004)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Approximately 438 pb-1 of e+e- data from the OPAL detector, taken with the LEP collider running at centre-of-mass energies of 192-209 Gev, are analyzed to search for evidence of chargino pair...

W Boson Polarisation at LEP2 (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Elements of the spin density matrix for W bosons in e+e- -> W+W- -> qqln events are measured from data recorded by the OPAL detector at LEP. This information is used calculate polarised differential...

Measurement of the partial widths of the Z into up- and down-type quarks (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Using the entire OPAL LEP1 on-peak Z hadronic decay sample, Z -> qbarq gamma decays were selected by tagging hadronic final states with isolated photon candidates in the electromagnetic calorimeter....

Flavour independent search for Higgs bosons decaying into hadronic final states in e+e- collisions (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A search for the Higgsstrahlung process e+e- -> hZ is described, where the neutral Higgs boson h is assumed to decay into hadronic final states. In order to be sensitive to a broad range of models,...

An Overview of the ATLAS High Level Trigger Dataflow and Supervision (2003)

Wheeler, S, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

The ATLAS High Level Trigger (HLT) system provides software-based event selection after the initial LVL1 hardware trigger. It is composed of two stages, the LVL2 trigger and the Event Filter (EF)....

The ATLAS Level-1 Central Trigger Processor (CTP) (2003)

Ellis, Nick, Wengler, T, Torga-Teixeira, R, Schörner-Sadenius, T, Spiwoks, R, Schuler, G A, ...

An Overview of Algorithms for the ATLAS High Level Trigger (2003)

Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, Boisvert, V, ...

Following rigorous software design and analysis methods, an object-based architecture has been developed to derive the second- and third-level trigger decisions for the future ATLAS detector at the...

Studies for a common selection software environment in ATLAS: from the Level-2 Trigger to the offline reconstruction (2003)

Wiedenmann, W, Armstrong, S R, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

The Atlas High Level Trigger's primary function of event selection will be accomplished with a Level-2 trigger farm and an Event Filter farm, both running software components developed in the Atlas...

Search for R-parity violating decays of sfermions at LEP (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A search for pair-produced scalar fermions under the assumption that R-parity is not conserved has been performed using data collected with the OPAL detector at LEP. The data samples analysed...

Experimental studies of unbiased gluon jets from $e^{+}e^{-}$ annihilations using the jet boost algorithm (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e- annihilations, i.e. gluon jets free of biases introduced by...

Study of Z Pair Production and Anomalous Couplings in $e^{+}e^{-}$ Collisions at $\sqrt{s}$ between 190 GeV and 209 GeV (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A study of Z-boson pair production in e+e- annihilation at center-of-mass energies between 190 GeV and 209 GeV is reported. Final states containing only leptons, (l+l-l+l- and l+l-nn), quark and...

Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-Pair Production at 189-209 GeV at LEP (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Cross-section and angular distributions for hadronic and lepton-pair final states in e+e- collisions at centre-of-mass energies between 189 GeV and 209 GeV, measured with the OPAL detector at LEP,...

A Study of $W^{+}W^{-}\gamma$ Events at LEP (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A study of W+W- events accomanied by hard photon radiation produced in e+e- collisions at LEP is presented. Events consistent with being two on-shell W bosons and an isolated photon are selected from...

Search for Anomalous Production of Di-lepton Events with Missing Transverse Momentum in $e^{+}e^{-}$ Collisions at $\sqrt{s}$ = 183-209 GeV (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

In total 1317 di-lepton events with significant missing transverse momentum were identified in a total data sample of 680 pb-1 collected at e+e- centre-of-mass energies ranging from 183 GeV to 209...

Search for the Single Production of Doubly-Charged Higgs Bosons and Constraints on their Couplings from Bhabha Scattering (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A search for single production of doubly-charged Higgs bosons has been performed using 600.7 pb^-1 of e+e- collision data with sqrt(s)=189--209GeV collected by the OPAL detector at LEP. No evidence...

A study of charm production in beauty decays with the OPAL detector at LEP (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Using an inclusive method, BR(b -> D\bar{D}X) has been measured in hadronic Z^0 decays with the OPAL detector at LEP. The impact parameter significance of tracks opposite tagged b-jets is used to...

Measurement of charged current triple gauge boson couplings using W pairs at LEP (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Triple gauge boson couplings are measured from W-pair and single photon events recorded by the OPAL detector at LEP at center-of-mass energies between 183 - 209 GeV with a total integrated luminosity...

Measurement of Heavy Quark Forward-Backward Asymmetries and Average B Mixing Using Leptons in Hadronic Z Decays (2003)

Abbiendi, G, Carter, A, De Wolf, E, McPherson, R A, Neal, H, Thomson, M, ...

Hadronic Z0 decays with identified electrons or muons have been used to measure the forward-backward asymmetries of e^+e^- --> Z0 --> bbbar and e^+e^- --> Z0 --> ccbar events. The asymmetries at...

The Trigger of the ATLAS Experiment (2003)

Schörner-Sadenius, T

With the high bunch-crossing and interaction rates and potentially large event sizes the experiments at the LHC challenge data acquisition and trigger systems. Within the ATLAS experiment, a...

Architecture of the ATLAS High Level Trigger Event Selection Software (2003)

Grothe, M, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

The ATLAS High Level Trigger (HLT) consists of two selection steps: the second level trigger and the event filter. Both will be implemented in software, running on mostly commodity hardware. Both...

Architecture of the ATLAS High Level Trigger Event Selection Software (2003)

Grothe, M, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

The ATLAS High Level Trigger (HLT) consists of two selection steps: the second level trigger and the event filter. Both will be implemented in software, running on mostly commodity hardware. Both...

Tests of models of color reconnection and a search for glueballs using gluon jets with a rapidity gap (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

Gluon jets with a mean energy of 22 GeV and purity of 95% are selected from hadronic Z0 decay events produced in e+e- annihilations. A subsample of these jets is identified which exhibits a large gap...

The Algorithm Steering and Trigger Decision mechanism of the ATLAS High Level Trigger (2003)

Comune, G, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

Given the extremely high output rate foreseen at LHC and the general-purpose nature of ATLAS experiment, an efficient and flexible way to select events in the High Level Trigger is needed. An...

The Algorithm Steering and Trigger Decision mechanism of the ATLAS High Level Trigger (2003)

Comune, G, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

Given the extremely high output rate foreseen at LHC and the general-purpose nature of ATLAS experiment, an efficient and flexible way to select events in the High Level Trigger is needed. An...

LEP 1 Heavy Flavour Electroweak Physics and 2-Fermion Processes at LEP 2 (2003)

Schörner-Sadenius, T

Results from heavy flavour electroweak physics at LEP1 are reviewed together with measurements of 2-fermion processes at LEP2. For the former measurements the emphasis is on analyses of heavy quark...

Supervision of the ATLAS High Level Trigger System (2003)

Wheeler, S, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

The ATLAS High Level Trigger (HLT) system provides software-based event selection after the initial LVL1 hardware trigger. It is composed of two stages, the LVL2 trigger and the Event Filter. The HLT...

Supervision of the ATLAS High Level Trigger System (2003)

Wheeler, S, Armstrong, S, Baines, J T M, Bee, C P, Biglietti, M, Bogaerts, A, ...

The ATLAS High Level Trigger (HLT) system provides software-based event selection after the initial LVL1 hardware trigger. It is composed of two stages, the LVL2 trigger and the Event Filter. The HLT...

Measurement of Isolated Prompt Photon Production in Photon-Photon Collisions at $\sqrt{s_{ee}}$=183-209 GeV (2003)

Abbiendi, G, Ainsley, C, Alexander, G, Åkesson, P F, Allison, J, Amaral, P, ...

For the first time at LEP the production of prompt photons is studied in the collisions of quasi-real photons using the OPAL data taken at e+e- centre-of-mass energies between 183 GeV and 209 GeV....

Measurement of Isolated Prompt Photon Production in Photon-Photon Collisions at $\sqrt{s_{ee}}$=183-209 GeV (2003)

Abbiendi, G, Ainsley, C, Alexander, G, Åkesson, P F, Allison, J, Amaral, P, ...

For the first time at LEP the production of prompt photons is studied in the collisions of quasi-real photons using the OPAL data taken at e+e- centre-of-mass energies between 183 GeV and 209 GeV....

Search for pair-produced leptoquarks in $e^{+}e^{-}$ interactions at $\sqrt{s}\simeq$ 189 -209 GeV (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

A search for pair-produced leptoquarks is performed using e+e- collision events collected by the OPAL detector at LEP at centre-of-mass energies between 189 and 209 GeV. The data sample corresponds...

Search for Stable and Long-Lived Massive Charged Particles in $e^{+}e^{-}$ Collisions at $\sqrt{s}$ = 130-209 GeV (2003)

Abbiendi, G, Ainsley, C, Alexander, G, Allison, J, Amaral, P, Anagnostou, G, ...

A search for stable and long-lived massive particles of electric charge |Q/e|=1 or fractional charges of 2/3, 4/3, and 5/3 is reported using data collected by the OPAL detector at LEP, at...

Test of non-commutative QED in the process $e^{+}e^{-} \to \gamma \gamma$ at LEP (2003)

Abbiendi, G, Ainsley, C, Alexander, G, Allison, J, Amaral, P, Anagnostou, G, ...

Non-communicative QED would lead to deviations from the Standard Model depending on a new energy scale $\Delta_{NC}$ and a unique direction in space defined by two angles $\eta$ and $\xi$. Here in...

Bose-Einstein Correlations of $\pi^{0}$ Pairs from Hadronic $Z^{0}$ Decays (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

We observed Bose-Einstein correlation in pi0 pairs produced in Z0 decays using the data sample collected by the OPAL detector at LEP 1 from 1991 to 1995. Using a static Gaussian picture for the pion...

A Measurement of Semileptonic B Decays to Narrow Orbitally-Excited Charm Mesons (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

The decay chain b -> Bbar -> D^{**0} l nu X, D^{**0} -> D^{*+} pi^-, D^{*+} -> D^0 pi^+, D^0 ->(Kpi or K3pi) is identified in a sample of 3.9 million hadronic Z decays collected with the OPAL...

Di-Jet Production in Photon-Photon colisions at $\sqrt{s_{ee}}$ from 189 to 209 GeV (2003)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

Di-jet producion is studied in collisions of quasi-real photons at e+e- centre- of-mass energies sqrt(s)ee from 189 to 209 GeV at LEP. The data were collected with the OPAL detector. Jets are...

A Measurement of the $\tau^{-}\to \mu^{-}\overline{\nu}_{\mu}\nu_{\tau}$ Branching Ratio (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

The tau -> mu nu nu branching ratio has been measured using data collected from 1990 to 1995 by the OPAL detector at the LEP collider. The resulting value of B(tau -> mu nu nu) = 0.1734 +-...

Charged particle multiplicities in heavy and light quark initiated events above the $Z^0$ peak (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

We have measured the mean charged particle multiplicities separately for bbbar, ccbar and light quark (uubar, ddbar, ssbar) initiated events produced in e+e- annihilations at LEP. The data were...

Multi-Photon Production in $e^{+}e^{-}$ collisions at $\sqrt{s}$ = 181 - 209 GeV (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

The process e+e- -> gamma gamma (gamma) is studied using data collected by the OPAL detector at LEP between the years 1997 and 2000. The data set corresponds to an integrated luminosity of 672.3pb-1...

Search for Nearly Mass-Degenerate Charginos and Neutralinos at LEP (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

A search was performed for charginos with masses close to the mass of the lightest neutralino in e+e- collisions at centre-of-mass energies of 189-209 GeV recorded by the OPAL detector at LEP. Events...

Search for the Standard Model Higgs Boson with the OPAL Detector at LEP (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

This paper summarises the search for the Standard Model Higgs boson in e+e- collisions at centre-of-mass energies up to 209 GeV performed by the OPAL Collaboration at LEP. The consistency of the data...

Measurement of the b quark forward-backward asymmetry around the $Z^{0}$ peak using an inclusive tag (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

The b quark forward-backward asymmetry has been measured using hadronic Z0 decays collected by the OPAL experiment at LEP. Z0 -> bbbar decays were selected using a combination of secondary vertex and...

Search for a low mass CP-odd Higgs boson in $e^{+}e^{-}$ collisions with the OPAL detector at LEP2 (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, G, Allison, J, Amaral, P, ...

We have analysed the data collected by OPAL at centre-of-mass energies between 189 and 209 GeV searching for Higgs boson candidates from the process e/sup +/e/sup -/ to h/sup 0/Z/sup 0/ followed by...

Measurement of the Cross-Section for the Process $\gamma\gamma \to p \overline{p}$ at $\sqrt{s}_{ee}$=183-189 GeV at LEP (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

The exclusive production of proton-antiproton pairs in the collisions of two quasi-real photons had been studied using data taken at sqrt(s)_ee=183 GeV and 189 GeV with the OPAL detector at LEP....

Charged Particle Momentum Spectra in $e^+ e^-$ annihilation at $\sqrt{s}$ = 192-209 GeV (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

Charged particle momentum distributions are studied in the reaction e+e- -> hadrons, using data collected with the OPAL detector at centre-of-mass energies from 192 GeV to 209 GeV. The data...

Search for scalar top and scalar bottom quarks at LEP (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

Searches for a scalar top quark and a scalar bottom quark have been performed using a data sample of 438 pb-1 at centre-of-mass energies of sqrt(s) = 192 - 209 GeV collected with the OPAL detector at...

Measurement of Neutral-Current Four-Fermion Production at LEP2 (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

Four-fermion final states qqbar e+e- and qqbar mu+mu- from neutral-current interactions in e+e- collisions are studied in the OPAL detector at LEP at centre-of-mass energies from 183 GeV to 209 GeV....

Inclusive Analysis of the b Quark Fragmentation Function in Z Decays at LEP (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

A study of b quark hadronisation is presented using inclusively reconstructed B hadrons in about four million hadronic Z decays recorded in 1992-2000 with the OPAL detector at LEP. The data are...

Search for associated production of massive states decaying into two photons in $e^{+}e^{-}$ annihilations at $\sqrt{s}$ = 88 - 209 GeV (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

A search is performed for production of short-lived particles in e+e- -> XY, with X -> gamma gamma and Y -> ffbar, for scalar X and scalar or vector Y. Model-independent limits in the range of 25-60...

Decay-mode independent searches for new scalar bosons with the OPAL detector at LEP (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

This paper describes topological searches for neutral scalar bosons S0 produced in association with a Z0 boson via the Bjorken process e+e- -> S0Z0 at centre-of-mass energies of 91 GeV and 183-209...

Measurement of the Charm structure Function $F_{2}^{\gamma},c$ of the Photon at LEP (2002)

Abbiendi, G, Ainsley, C, Åkesson, P F, Alexander, Gideon, Allison, J, Amaral, P, ...

The production of charm quarks is studied in deep-inelastic electron-photon scattering using data recorded by the OPAL detector at LEP at normal e+e- centre-of-mass energies from 183 to 209 GeV. The...

Measurement of the Strong Coupling Constant $\alpha_s$ and the Vector and Axial-Vector Spectral Functions in Hadronic Tau Decays (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

The spectral functions of the vector current and the axial-vector current have been measured in hadronic tau decays using the OPAL detector at LEP. Within the framework of the Operator Product...

Measurement of the Michel Parameters in Leptonic Tau Decays (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

The Michel parameters of the leptonic tau decays are measured using the OPAL detector at LEP. The Michel parameters are extracted from the energy spectra of the charged decay leptons and from their...

Search for Higgs bosons and new particles decaying into two photons at $\sqrt{s}$ = 183 GeV (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

A search for the resonant production of high mass photon pairs associated with a leptonic or hadronic system has been performed using a data sample of 57.7 pb-1 collected at an average center-of-mass...

Multi-photon production in $e^{+}e^{-}$ collisions at $\sqrt{s}$= 183 GeV (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

The process e+e- to gamma gamma (gamma) is studied using data recorded with the OPAL detector at LEP. The data sample corresponds to a total integrated luminosity of 56.2 pb-1 taken at a...

Inclusive production of charged hadrons and $K_{s}^{0}$ mesons in photon-photon collisions (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

The production of charged hadrons and K_s mesons in the collisions of quasi-real photons has been measured using the OPAL detector at LEP. The data were taken at e+e- centre-of-mass energies of 161...

Measurement of Tau Branching Ratios to Five Charged Hadrons (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

The branching ratios of the decay of the tau lepton to five charged hadrons have been measured with the OPAL detector at LEP using data collected between 1991 and 1995 at e+e- centre-of-mass energies...

Measurements of flavour dependent fragmentation functions in $Z^{0} \to q\overline{q}$ events (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

Fragmentation functions for charged particles in Z -> qq(bar) events have been measured for bottom (b), charm (c) and light (uds) quarks as well as for all flavours together. The results are based on...

Bose-Einstein correlations of three charged pions in hadronic $Z^{0}$ decays (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

Bose-Einstein Correlations (BEC) of three identical charged pions were studied in 4 x 10^6 hadronic Z^0 decays recorded with the OPAL detector at LEP. The genuine three-pion correlations, corrected...

An upper limit for the $\tau$-neutrino mass from $\tau \to 5\pi^{\pm} \nu_{\tau}$ decays (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

An upper limit for the tau-neutrino mass has been determined from the decay tau -> 5pi+- \nu_tau using data collected with the OPAL detector from 1991 to 1995 in e+e- collisions at \sqrt{s} ~ M_Z. A...

Photon and light meson production in hadronic $Z^{0}$ decays (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

The inclusive production rates and differential cross-sections of photons and mesons with a final state containing photons have been measured with the OPAL detector at LEP. The light mesons covered...

Production of $K^{0}_{S}$ and $\Lambda$ in Quark and Gluon Jets from $Z^{0}$ Decay (1998)

Ackerstaff, K, Alexander, Gideon, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...

The production of K^0_S mesons and Lambda baryons in quark and gluon jets has been investigated using two complementary techniques. In the first approach, which provides high statistical accuracy,...

QCD at HERA 2006-11-05 - 2006-11-05

T. Schörner-Sadenius, DESY Forschung Hochenergiephysik

Conference presentation

Jets and the Hadronic Final State at HERA 2006-12-02 - 2006-12-02

T. Schörner-Sadenius, DESY Forschung Hochenergiephysik

Conference presentation

Dijet Cross Sections at High Q2 at ZEUS 2006-04-20 - 2006-04-24

T. Schörner-Sadenius, DESY Forschung Hochenergiephysik

Conference presentation

Angular Correlations in Three-Jet Production and Subjet Distributions in NC DIS at ZEUS 2006-04-20 - 2006-04-24

T. Schörner-Sadenius, DESY Forschung Hochenergiephysik

Conference presentation