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...
Undulator-based production of polarized positrons (2009)
Alexander, G, Barley, J, Batygin, Y, Berridge, S, Bharadwaj, V, Bower, G, ...
Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics (2008)
Abat, E., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., ...
A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance...
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...
Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...
The inclusive production of prompt photons with energy above 10 GeV is measured using the OPAL detector in hadronic Z^0 decays at LEP. In contrast to previous measurements, the prompt photons were...
Measurement of f(c -> D^*+ X), f(b -> D^*+ X) and Gamma_cc(bar)/Gamma_had using D^*+/- Mesons (2008)
Al, K Ackerstaff Et, Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, K J, ...
The production rates of D^*+/- mesons in charm and bottom events at centre-of-mass energies of about 91 GeV and the partial width of primary cc(bar) pairs in hadronic Z^0 decays have been measured at...
A Measurement of the B_s^0 Lifetime using Reconstructed D_s^- Mesons (2008)
Al, K Ackerstaff Et, Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, K J, ...
We report a measurement of the B^0_s meson lifetime from B_s^0 -> D^-_s X decays, where D_s^- mesons are reconstructed in the D_s^- -> phi pi^- and D_s^- -> K^{*0} K^- decay channels. From...
Al, K Ackerstaff Et, Alexander, G, Allison, J, Altekamp, N, Anderson, K J, Anderson, S, ...
Production of events with hadronic and leptonic final states has been measured in e^+e^- collisions at centre-of-mass energies of 130-172 GeV, using the OPAL detector at LEP. Cross-sections and...
Observation of polarized positrons from an undulator-based source (2008)
Alexander, G, Barley, J, Batygin, Y, Berridge, S, Bharadwaj, V, Bower, G, ...
Observation of Polarized Positrons from an Undulator-Based Source (2008)
G. Alexander, J. Barley, Y. Batygin, S. Berridge, V. Bharadwaj, ...
Journal article
Low-energy Positron Polarimetry at the ILC (2008)
G. Alexander, R. Dollan, T. Lohse, S. Riemann, A. Schälicke, ...
Internal report | Preprint
Polarized Positrons and Electrons at the Linear Collider. (2008)
G. Moortgat-Pick, DESY Maschinenphysik, T. Abe, G. Alexander, B. Ananthanarayan, A.A. Babich, ...
Journal article
Polarized positrons and electrons at the linear collider (2008)
Moortgat-Pick, G, Abe, T, Alexander, G, Ananthanarayan, B, Babich, AA, Bharadwaj, V, ...
The proposed International Linear Collider (ILC) is well-suited for discovering physics beyond the Standard Model and for precisely unraveling the structure of the underlying physics. The physics...
A study of b quark fragmentation at LEP is presented using a sample of semileptonic B decays containing a fully reconstructed charm meson. The data are compared to several theoretical models for...
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....
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...
Study on low-energy positron polarimetry 2006-03-09 - 2006-03-13 (2007)
A. Schälicke, G. Alexander, R. Dollan, K. Laihem, ...
Contribution to a conf. proceeding (journal)
J. Kovermann, A. Stahl, A.A. Mikhailichenko, D. Scott, ...
Contribution to a conf. proceeding (journal)
A. Mikhailichenko, G. Alexander, Y. Batygin, S. Berridge, ...
Contribution to a conf. proceeding (book/online)
Pocock, Kenneth F., Alexander, G., Hayasaka, Yoji, Jones, P., Waters, Elizabeth Joy
Protein haze formation in white wine is dependent on the presence of both wine protein and other unknown wine components, termed factor(s) X. The ability to reconstitute protein haze upon heating...
Pocock, Kenneth F., Alexander, G., Hayasaka, Yoji, Jones, P., Waters, Elizabeth Joy
Protein haze formation in white wine is dependent on the presence of both wine protein and other unknown wine components, termed factor(s) X. The ability to reconstitute protein haze upon heating...
Polarized positrons and electrons at the linear collider (2007)
Moortgat-Pick, G, Abe, T, Alexander, G, Ananthanarayan, B, Babich, AA, Bharadwaj, V, ...
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...
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...
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...
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 at LEP (2006)
Schael, S., Barate, R., Bruneliere, R., De Bonis, I., Decamp, D., Goy, C., ...
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...
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...
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...
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...
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...
Moortgat-Pick, G, Abe, T, Alexander, G, Ananthanarayan, B, Babich, A A, Barber, D, ...
The proposed International Linear Collider (ILC) is well-suited for discovering physics beyond the Standard Model and for precisely unraveling the structure of the underlying physics. The physics...
Polarized positrons and electrons at the linear collider (2005)
Moortgat-Pick, G, Abe, T, Alexander, G, Ananthanarayan, B, Babich, A A, Barber, D, ...
The proposed International Linear Collider (ILC) is well-suited for discovering physics beyond the Standard Model and for precisely unraveling the structure of the underlying physics. The physics...
Moortgat-Pick, G., Abe, T., Alexander, G., Ananthanarayan, B., Babich, A. A., Bharadwaj, V., ...
The proposed International Linear Collider (ILC) is well-suited for discovering physics beyond the Standard Model and for precisely unraveling the structure of the underlying physics. The physics...
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...
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...
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...
Preventing protein haze in bottled white wine (2005)
Waters, Elizabeth Joy, Alexander, G., Muhlack, Richard Anthony, Pocock, K. F., Colby, Christopher Brett, O'Neill, Brian Kevin, ...
Copyright © 2008 Australian Society of Viticulture and Oenology Inc.
Preventing protein haze in bottled white wine (2005)
Waters, Elizabeth Joy, Alexander, G., Muhlack, Richard Anthony, Pocock, K. F., Colby, Christopher Brett, O'Neill, Brian Kevin, ...
Copyright © 2008 Australian Society of Viticulture and Oenology Inc.
Preventing protein haze in bottled white wine (2005)
Waters, Elizabeth Joy, Alexander, G, Muhlack, Richard Anthony, Pocock, Kenneth F, Colby, Christopher Brett, ONeill, Brian K, ...
Preventing protein haze in bottled white wine (2005)
Waters, Elizabeth Joy, Alexander, G, Muhlack, Richard Anthony, Pocock, Kenneth F, Colby, Christopher Brett, ONeill, Brian K, ...
Preventing protein haze in bottled white wine (2005)
Waters, Elizabeth Joy, Alexander, G, Muhlack, Richard Anthony, Pocock, Kenneth F, Colby, Christopher Brett, ONeill, Brian K, ...
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...
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...
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...
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...
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....
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....
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,...
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...
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...
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...
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...
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...
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...
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...
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....
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....
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...
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...
A Study of W+ W- gamma events at LEP (2003)
OPAL Collaboration, Abbiendi, G, Ainsley, C, Akesson, P F, Alexander, G, Allison, J, ...
Search for chargino and neutralino production at s**(1/2) = 192-GeV to 209 GeV at LEP (2003)
OPAL Collaboration, Abbiendi, G, Ainsley, C, Akesson, P F, Alexander, G, Allison, J, ...
Adams, C., Fraser, D., McCarthy, I., Shields, S., Waldron, S., Alexander, G.
The serendipitous discovery of a body-size dimorphism amongst the sexually mature Arctic charr Salvelinus alpinus of Loch Tay is described. Sexually mature Arctic charr, collected by gill netting on...
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...
A Simultaneous measurement of the QCD color factors and the strong coupling (2001)
OPAL Collaboration, Abbiendi, G, Ainsley, C, Akesson, PF, Alexander, G, Allison, J, ...
Leading particle production in light flavor jets (1999)
OPAL Collaboration, Abbiendi, G, Ackerstaff, K, Akesson, PF, Alexander, G, Allison, J, ...
Enhancing the identification of excessive drinkers on medical wards: a 1-year follow-up study (1999)
Search for unstable heavy and excited leptons in e e - collisions at s = 170-172 GeV (1998)
We have searched for unstable neutral and charged heavy leptons, N and L , and for excited states of neutral and charged leptons, # # ,e # , # and # # ,ine e - collisions at centre-of-mass energies...
ATLAS calorimeter performance (1996)
ATLAS Collaboration, Airapetian, A, Grabsky, V, Hakopian, H, Vartapetian, A, Fares, F, ...
ATLAS computing technical proposal (1996)
ATLAS Collaboration, Airapetian, A, Grabsky, V, Hakopian, H, Vartapetian, A, Fares, F, ...
A Study of Four-Fermion Final States with High Multiplicity at LEP (1996)
The Opal Collaboration, G. Alexander
A search for ` + ` \Gamma qq (`=e,) four-fermion final states in high multiplicity events has been performed at p s m Z and above the Z peak at p s = 130 GeV and p s = 136 GeV. The data taken with...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L., Assmann, R., Billan, J., Birr, W., Blondel, A., Bobbink, G., ...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L., Assmann, R., Billan, J., Birr, W., Blondel, A., Bobbink, G., ...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L., Assmann, R., Billan, J., Birr, W., Blondel, A., Bobbink, G., ...
KEAYS, R, POTTER, D, O'GRADY, J, PEACHEY, T, ALEXANDER, G, WILLIAMS, R
Several centres that perform liver transplantation for fulminant hepatic failure have experience of patients who have not regained consciousness despite adequate graft function. In some of these,...
Searches for neutral Higgs bosons in e+e- collisions at LEP (1990)
Akrawy, M Z, Alexander, G, Allison, J, Allport, P P, Anderson, K J, Armitage, J C, ...
Limits on neutral heavy lepton production from Z0 decay (1990)
Akrawy, M Z, Alexander, G, Allison, J, Allport, P P, Anderson, K J, Armitage, J C, ...
Evidence for final state photons in multihadronic decays of the Z0 (1990)
Akrawy, M Z, Alexander, G, Allison, J, Allport, P P, Anderson, K J, Armitage, J C, ...
The OPAL detector at LEP (1990)
OPAL Collaboration, Ahmet, K, Akrawy, MZ, Alexander, G, Allison, J, Allport, PP, ...
STUDY OF THE REACTION pi- p ---> omega n AT 12-GeV/c
Dowell, JD, Garvey, J, Jobes, M, Kenyon, IR, Mawson, J, McMahon, T, ...
Adams, C., Fraser, D., McCarthy, I., Shields, S., Waldron, S., Alexander, G.
The serendipitous discovery of a body-size dimorphism amongst the sexually mature Arctic charr Salvelinus alpinus of Loch Tay is described. Sexually mature Arctic charr, collected by gill netting on...
Brown adipose tissue in the new-born calf (Bos taurus).
Alexander, G, Bennett, J W, Gemmell, R T
1. Electron microscopic examinations revealed that most of the adipose tissue of new-born calves had the cellular morphology of brown adipose tissue; only subcutaneous tissue had the cellular...
Alexander, G., Bell, A. W., Setchell, B. P.
1. Lambs less than 3 days old, exposed to thermoneutral or intensely cold conditions in a respiration chamber, were infused with adrenaline or noradrenaline, 1 or 10 μg/kg.min; and the effects on...
Cardiovascular function in young lambs during summit metabolism
1. Cardiac output in lambs less than 3 days old was 50-100% higher during summit metabolism than during exposure to thermoneutral conditions.
Summit metabolism and cardiovascular function in young lambs during hyperoxia and hypoxia
1. Exposure of lambs at sea level to air containing more than 33% oxygen resulted in a small increase in summit metabolism (maximum oxygen consumption on severe cold exposure) in some lambs, and in...
Effects of cold exposure on tissue blood flow in the new-born lamb
Alexander, G., Bell, A. W., Hales, J. R. S.
1. Conscious lambs less than 2 days old were exposed to thermoneutral and to cold environments, and the radioactive microsphere technique was used to obtain measurements of blood flow to most tissues...
Shivering and non-shivering thermogenesis during summit metabolism in young lambs
1. Summit metabolism of lambs declined steadily from about 3·5 l. O2/kg.hr during the first day of life, to about 2·0 l. O2/kg.hr at 2 months of age.
Alexander, G., Mills, S. C., Scott, T. W.
1. Exposure to cold increased the plasma levels of glucose and lactate in young lambs (< 1-63 days old). Free fatty acid concentrations also increased, the increase being much greater in lambs older...
Misdiagnosed HIV infection in pregnant women: implications for clinical care.
Sheon, A R, Fox, H E, Alexander, G, Buck, A, Higgins, A, McDermott, S M, ...
Out of nearly 900 women in a research study of human immunodeficiency virus infection in pregnancy, 8 were subsequently found not to be infected. Misdiagnoses could have resulted from (a) laboratory...
Perinatal mortality and its relationship to the reporting of low-birthweight infants.
Phelan, S T, Goldenberg, R, Alexander, G, Cliver, S P
OBJECTIVES: This study examined changes in the reporting of very low-birthweight infants in Alabama from 1974 to 1994 and the impact on perinatal mortality rates. METHODS: Linked live birth, neonatal...
Lead exposure and child behavior.
Sciarillo, W G, Alexander, G, Farrell, K P
OBJECTIVES. Unlike cognitive impairments associated with lead exposure, lead-associated child behavior problems have been difficult to specify, particularly in young children. METHODS. The Child...
Adams, C., Fraser, D., McCarthy, I., Shields, S., Waldron, S., Alexander, G.
The serendipitous discovery of a body-size dimorphism amongst the sexually mature Arctic charr Salvelinus alpinus of Loch Tay is described. Sexually mature Arctic charr, collected by gill netting on...
Activation of the classical complement pathway in spontaneous bacterial peritonitis.
Bird, G, Senaldi, G, Panos, M, Rolando, N, Alexander, G, Vergani, D, ...
To investigate the possibility that low complement concentrations in the plasma and ascites of patients with severe liver disease could be secondary to complement consumption, complement activation...
Randomised controlled trial of lymphoblastoid interferon for chronic active hepatitis B.
Anderson, M G, Harrison, T J, Alexander, G, Zuckerman, A J, Murray-Lyon, I M
Thirty male patients (27 homosexual) with biopsy proven chronic active hepatitis B were randomised to receive lymphoblastoid interferon (Wellferon) or no treatment. All patients were HBeAg positive...
Hepatic histology in hepatitis C virus carriers coinfected with hepatitis G virus
Petrik, J, Guella, L, Wight, D, Pearson, G, Hinton, J, Parker, H, ...
a Division of Transfusion Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's NHS Trust, Cambridge, UK, b Department of Medicine, University of Cambridge School of Clinical...
Walsh, K, Woodall, T, Lamy, P, Wight, D, Bloor, S, Alexander, G
Fibrosing cholestatic hepatitis (FCH) is a severe clinical and histological variant of hepatitis B virus (HBV) infection seen most commonly in the HBV infected allograft after liver transplantation....
Elevated plasma interleukin-6 and increased severity and mortality in alcoholic hepatitis.
Sheron, N, Bird, G, Goka, J, Alexander, G, Williams, R
Recent studies in alcoholic hepatitis have proposed a role for the cytokine tumour necrosis factor-alpha (TNF-alpha) a mediator of endotoxic shock in sepsis. In this study plasma levels of the...
Alcohol is a major cause of liver cirrhosis in the Western world and accounts for the majority of cases of liver cirrhosis seen in district general hospitals in the UK. The three most widely...
Update on chronic viral hepatitis
Many recent and significant advances in the field of chronic viral hepatitis, including therapy, suggest that an update on chronic hepatitis is timely. Chronic hepatitis B virus infection remains a...
Liver transplantation for hepatitis C virus related liver disease
Liver transplantation is a useful treatment for end stage liver disease of all aetiologies but recurrent disease presents an ongoing challenge, particularly for hepatitis C virus (HCV) where...
The E166 Experiment: Undulator-Based Production of Polarized Positrons
Mikhailichenko, A, Alexander, G, Batygin, Y, Berridge, S, Bharadwaj, V, Bower, G, ...
The Opal Collaboration, K. Ackerstaff, G. Alexander
Production of events with hadronic and leptonic final states has been measured in e + e \Gamma collisions at centre-of-mass energies of 130--172 GeV, using the OPAL detector at LEP. Cross-sections...