B. Badelek

Publication List Details

Period

1978 - 2009

Number

175

Co-Authors

Measurement of the Longitudinal Spin Transfer to Lambda and Anti-Lambda Hyperons in Polarised Muon DIS (2009)

Alekseev, M, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Amoroso, A, Austregesilo, A, ...

The longitudinal polarisation transfer from muons to lambda and anti-lambda hyperons, D_LL, has been studied in deep inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment...

Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering (2009)

Alekseev, M, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Amoroso, A, Austregisilio, A, ...

We present a LO evaluation of helicity densities of valence, \Delta u_v+\Delta d_v, non-strange sea, \Delta\bar{u}+\Delta\bar{d}, and strange quarks, \Delta s (assumed to be equal to \Delta\bar{s})....

Direct Measurement of the Gluon Polarisation in the Nucleon via Charmed Meson Production (2008)

Alekseev, M, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Amoroso, A, Arbuzov, A, ...

We present the first measurement of the gluon polarisation in the nucleon based on the photon-gluon fusion process tagged by charmed meson production and decay to charged K and pi. The data were...

Direct Measurement of the Gluon Polarisation in the Nucleon via Charmed Meson Production (2008)

Alekseev, M, Alexandrov, Yu, Alexeev, G D, Amoroso, A, Arbuzov, A, Badelek, B, ...

We present the first measurement of the gluon polarisation in the nucleon based on the photon-gluon fusion process tagged by charmed meson production and decay to charged K and pi. The data were...

Collins and Sivers Transverse Spin Asymmetries for Pions and Kaons on Deuterons (2008)

Aleeksev, M, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Amoroso, A, Arbuzov, A, ...

The measurements of the Collins and Sivers asymmetries of identified hadrons produced in deep-inelastic scattering of 160 GeV/c muons on a transversely polarised 6LiD target at COMPASS are presented....

Collins and Sivers Transverse Spin Asymmetries for Pions and Kaons on Deuterons (2008)

Aleeksev, M, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Amoroso, A, Arbuzov, A, ...

The measurements of the Collins and Sivers asymmetries of identified hadrons produced in deep-inelastic scattering of 160 GeV/c muons on a transversely polarised 6LiD target at COMPASS are presented....

The Polarised Valence Quark Distribution from semi-inclusive DIS (2007)

Alekseev, M, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Amoroso, A, Arbuzov, A, ...

The semi-inclusive difference asymmetry A^{h+ - h-} for hadrons of opposite charge has been measured by the COMPASS experiment at CERN. The data were collected in the years 2002-2004 using a 160 GeV...

Double spin asymmetry in exclusive $\rho^0$ muoproduction at COMPASS (2007)

Alexakhin, V Yu, Alekseev, M, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Arbuzov, A, ...

The longitudinal double spin asymmetry A_1^rho for exclusive leptoproduction of rho^0 mesons, mu + N -> mu + N + rho, is studied using the COMPASS 2002 and 2003 data. The measured reaction is...

The COMPASS Experiment at CERN (2007)

Abbon, P, Albrecht, E, Alexakhin, V Yu, Alexandrov, Yu, Alexeev, G D, Alekseev, M G, ...

The COMPASS experiment makes use of the CERN SPS high-intensitymuon and hadron beams for the investigation of the nucleon spin structure and the spectroscopy of hadrons. One or more outgoing...

Spin asymmetry $A^d_1$ and the spin-dependent structure function $g^d_1$ of the deuteron at low values of $x$ and $Q^2$ (2007)

Ageev, E S, Alexakhin, V Yu, Alexandrov, Y, Alexeev, G D, Amoroso, A, Badelek, B, ...

We present a precise measurement of the deuteron longitudinal spin asymmetry $A_1^d$ and of the deuteron spin-dependent structure function $g_1^d$ at $Q^2 < $ 1~(GeV/$c$)$^2$ and $4\cdot$10$^{-5} < x...

A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target (2006)

Ageev, E S, Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Alexeev, M, Amoroso, A, ...

New high precision measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised 6LiD target are presented. The data...

Coherent Bremsstrahlung, Coherent Pair Production, Birefringence and Polarimetry in the 20-170 GeV energy range using aligned crystals (2005)

Apyan, A, Avakian, R O, Badelek, B, Ballestrero, S, Biino, C, Birol, I, ...

The processes of coherent bremsstrahlung (CB) and coherent pair production (CPP) based on aligned crystal targets have been studied in the energy range 20-170 GeV. The experimental arrangement...

Coherent bremsstrahlung, boherent pair production, birefringence and polarimetry in the 20-170 GeV energy range using aligned crystals (2005)

Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., ...

The processes of coherent bremsstrahlung (CB) and coherent pair production (CPP) based on aligned crystal targets have been studied in the energy range 20-170 GeV. The experimental arrangement...

Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs (2005)

Ageev, E S, Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Badelek, B, ...

We present a determination of the gluon polarization Delta G/G in the nucleon, based on the helicity asymmetry of quasi-real photoproduction events, Q^2

Results on the Coherent Interaction of High Energy Electrons and Photons in Oriented Single Crystals (2005)

Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., ...

The CERN-NA-59 experiment examined a wide range of electromagnetic processes for multi-GeV electrons and photons interacting with oriented single crystals. The various types of crystals and their...

The Photon Collider at Tesla (2004)

Badelek, B, Blochinger, C, Blumlein, J, Boos, E, Brinkmann, R, Burkhardt, H, ...

High energy photon colliders $(\gamma\gamma,\gamma e)$ are based on $e^- e^-$ linear colliders where high energy photons are produced using Comptonscattering of laser light on high energy electrons...

Measurement of Coherent Emission and Linear Polarization of Photons by Electrons in the Strong Fields of Aligned Crystals (2004)

Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., ...

We present new results regarding the features of high energy photon emission by an electron beam of 178 GeV penetrating a 1.5 cm thick single Si crystal aligned at the Strings-Of-Strings (SOS)...

Spin asymmetries for events with high $p_T$ hadrons in DIS and an evaluation of the gluon polarization (2004)

Adeva, B, Arik, A, Arvidson, A, Badelek, B, Baum, G, Berglund, P, ...

We present a measurement of the longitudinal spin cross section asymmetry for deep inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of...

The Photon Collider at Tesla (2004)

Badelek, B, Blochinger, C, Blumlein, J, Boos, E, Brinkmann, R, Burkhardt, H, ...

High energy photon colliders $(\gamma\gamma,\gamma e)$ are based on $e^- e^-$ linear colliders where high energy photons are produced using Comptonscattering of laser light on high energy electrons...

Linear to Circular Polarisation Conversion using Birefringent Properties of Aligned Crystals for Multi-GeV Photons (2003)

Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., ...

We present the first experimental results on the use of a thick aligned Si crystal acting as a quarter wave plate to induce a degree of circular polarisation in a high energy linearly polarised...

Spin dependent structure function $g_{1}(x,Q^{2})$ at low x and low $Q^{2}$ (2003)

Badelek, B

This is a review of experimental and phenomenological investigations of the nucleon spin dependent structure function g1 at low values of x and Q^2.

Coherent Pair Production by Photons in the 20-170 GeV Energy Range Incident on Crystals and Birefringence (2003)

Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., ...

The cross section for coherent pair production by linearly polarised photons in the 20-170 GeV energy range was measured for photon aligned incidence on ultra-high quality diamond and germanium...

Spin structure function $g_{1}$ at low x: status and plans (2001)

Badelek, B

A brief review of measurements and expectations concerning the spin structure function g_1 of the nucleon at low values of the scaling variable x is given.

Spin structure function g_1 at low x: status and plans (2001)

Badelek, B.

A brief review of measurements and expectations concerning the spin structure function g_1 of the nucleon at low values of the scaling variable x is given.

Parametrisation of F_2^gamma at low Q^2 and of sigma(gamma,gamma) and sigma(gamma^*,gamma) at high energies (2000)

Badelek, B., Krawczyk, M., Kwiecinski, J., Stasto, A. M.

A parametrisation of the real photon structure function F_2^gamma in the low Q^2, low x region is formulated. It includes both the VMD and the QCD components, the latter suitably extrapolated to the...

Spin dependent structure function g_1 at low x and low Q^2 (1999)

Badelek, B., Kiryluk, J., Kwiecinski, J.

Theoretical description of the spin dependent structure function g_1(x,Q^2) in the region of low values of x and Q^2 is presented. It contains the Vector Meson Dominance contribution and the QCD...

Measurement of the SMC muon beam polarisation using the asymmetry in the elastic scattering off polarised electrons (1999)

Adams, D, Adeva, B, Akdogan, T, Arik, E, Arvidson, A, Badelek, B, ...

A muon beam polarimeter was built for the SMC experiment at the CERN SPS, for beam energies of 100 and 190~GeV. The beam polarisation is determined from the asymmetry in the elastic scattering off...

Spin Asymmetries $A_1$ of the Proton and the Deuteron in the Low $x$ and Low $Q^2$ Region from Polarized High Energy Muon Scattering (1999)

Adeva, B, Arik, E, Arvidson, A, Badelek, B, Baum, G, Berglund, P, ...

We present the results of the spin asymmetries $A_1$ of the proton and the deuteron in the kinematic region extending down to $x=6\cdot 10^{-5}$ and $Q^2=0.01$ GeV$^2$. The data were taken with a...

A large streamer chamber muon tracking detector in a high-flux fixed-target application (1999)

Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, M K, ...

Arrays of limited streamer tubes of the Iarocci type were deployed in our experiment at CERN as part of a forward muon detector system with provisions for the beam to pass through the center of each...

The polarized double cell target of the SMC (1999)

Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, M K, ...

The polarized target of the Spin Muon Collaboration at CERN was used for deep inelastic muon scattering experiments during 1993 to 1996 with a polarized muon beam to investigate the spin structure of...

F_2^gamma at low Q^2 and sigma_{\gamma \gamma} at high energies (1999)

Badelek, B., Kwiecinski, J., Stasto, A.

The parametrisation of the photon structure function in the low Q^2 region is formulated. It includes the VMD contribution and the QCD improved parton model component suitably extrapolated to the low...

A next-to-leading order QCD analysis of the spin structure function $g_1$ (1998)

Adeva, B, Akdogan, T, Arik, E, Badelek, B, Bardin, G, Baum, G, ...

We present a next-to-leading order QCD analysis of the presently available data on the spin structure function $g_1$ including the final data from the Spin Muon Collaboration (SMC). We present resu...

Spin Asymmetries $A_1$ and Structure Functions $g_1$ of the Proton and the Deuteron from Polarized High Energy Muon Scattering (1998)

Adeva, B, Akdogan, T, Arik, E, Arvidson, A, Badelek, B, Bardin, G, ...

We present the final results of the spin asymmetries $A_1$ and the spin structure functions $g_1$ of the proton and the deuteron in the kinematic range $0.0008

Polarised quark distributions in the nucleon from semi-inclusive spin asymmetries (1997)

Adeva, B, Akdogan, T, Arik, E, Arvidson, A, Badelek, B, Bardin, G, ...

We present a measurement of semi-inclusive spin asymmetries for positively and negatively charged hadrons from deep inelastic scattering of polarised muons on polarised protons and deuterons in the...

The spin-dependent structure function $g_1(x)$ of the proton from polarized deep-inelastic muon scattering (1997)

Adeva, B, Arik, E, Arvidson, A, Badelek, B, Bardin, G, Baum, G, ...

We present a new measurement of the virtual photon proton asymmetry $A_1^{\rm p}$ from deep inelastic scattering of polarized muons on polarized protons in the kinematic range $0.0008 < x < 0.7$ and...

Measurement of proton and nitrogen polarization in ammonia and a test of equal spin temperature (1997)

Adeva, B, Arik, E, Arvidson, A, Badelek, B, Baum, G, Berglund, P, ...

The 1996 data taking of the SMC experiment used polarized protons to measure the spin dependent structure function $g_1$ of the proton. Three liters of solid granular ammonia were irradiated at the...

Spin structure of the proton from polarized inclusive deep-inelastic muon-proton scattering (1997)

Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, M K, ...

We have measured the spin-dependent structure function $g_1^{\rm p}$ in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range $0.003 < x < 0.7$ and...

The spin-dependent structure function $g_{1}(x)$ of the deuteron from polarized deep-inelastic muon scattering (1997)

Adams, D, Adeva, B, Akdogan, T, Arik, E, Arvidson, A, Badelek, B, ...

We present a new measurement of the spin-dependent structure function $g_1^{\rm d}$ of the deuteron from deep inelastic scattering of $190~\mbox{GeV}$ polarized muons on polarized deuterons. The...

Working Group Report on the Structure of the Proton (1996)

Badelek, B., Bartels, J., Brook, N., De Roeck, A., Gehrmann, T., Lancaster, M., ...

We summarize the developments on the structure of the proton that were studied at the Workshop on "HERA Physics" that was held in Durham in September 1995. We survey the latest structure function...

A model for $F_L$ and $R={F_L/F_T}$ at low $x$ and low $Q^2$ (1996)

Badelek, B., Kwiecinski, J., Stasto, A.

A model for the longitudinal structure function $F_L$ at low $x$ and low $Q^2$ is presented, which includes the kinematical constraint $F_L \sim Q^4$ as $Q^2 \rightarrow 0$. It is based on the...

Polarisation of valence and non-strange sea quarks in the nucleon from semi-inclusive spin asymmetries (1996)

Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...

We present a measurement of semi-inclusive spin asymmetries for positively and negatively charged hadrons from deep inelastic scattering of polarised muons on polarised protons and deuterons in the...

Large enhancement of deuteron polarization with frequency modulated microwaves (1995)

Adeva, B, Ahmad, E, Arik, S, Arvidson, A, Badelek, B, Ballintijn, M K, ...

We report a large enhancement of 1.7 in deuteron polarization up to values of 0.6 due to frequency modulation of the polarizing microwaves in a two liters polarized target using the method of dynamic...

The structure function ratios F$_{2}^{Li}$/F$_{2}^{D}$ and F$_{2}^{C}$/F$_{2}^{D}$ at small x (1995)

Arneodo, M, Arvidson, A, Badelek, B, Ballintijn, M K, Baum, G, Beaufays, J, ...

We present the structure function ratios F2(Li)/F2(D) and F2(C)/F2(D) measured in deep inelastic muon-nucleus scattering at a nominal incident muon energy of 200 GeV. The kinematic range 0.0001 < x <...

The Structure Function Ratios F2(Li)/F2(D) and F2(C)/F2(D) at small x (1995)

COLLABORATION, THE NEW MUON, Arneodo, M., Arvidson, A., Badelek, B., Ballintijn, M., Baum, G., ...

We present the structure function ratios F2(Li)/F2(D) and F2(C)/F2(D) measured in deep inelastic muon-nucleus scattering at a nominal incident muon energy of 200 GeV. The kinematic range 0.0001 < x <...

Spin asymmetry in muon-proton deep inelastic scattering on a transversely-polarized target (1994)

Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, M K, ...

We measured the spin asymmetry in the scattering of 100 GeV longitudinally-polarized muons on transversely polarized protons. The asymmetry was found to be compatible with zero in the kinematic range...

Measurement of the spin-dependent structure function g$_{1}$(x) of the proton (1994)

Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, M K, ...

Abstract : We have measured the spin-dependent structure function g_1^p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003

Shadowing in the Deuteron and the New $F_2^n/F_2^p$ Measurements (1994)

Badelek, B., Kwiecinski, J.

The quantity $2F_2^d(x,Q^2)/F_2^p(x,Q^2)-1$ is calculated in the region of low $x$ and low- and moderate $Q^2$ relevant for recent NMC and E665 measurements as well as for the expected final results...