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...
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...
Fast photon detection for the COMPASS RICH detector (2006)
Schill, C, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, ...
The COMPASS experiment at the SPS accelerator at CERN uses a large scale Ring Imaging CHerenkov detector (RICH) to identify pions, kaons and protons in a wide momentum range. For the data taking in...
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...
Fast Photon Detection for Particle Identification with COMPASS RICH-1 (2006)
Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, ...
Particle identification at high rates is an important challenge for many current and future high-energy physics experiments. The upgrade of the COMPASS RICH-1 detector requires a new technique for...
The Deuteron Spin-dependent Structure Function $g^{d}_1$ and its First Moment (2006)
Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Alexeev, M, Amoroso, A, Badeek, B, ...
We present a measurement of the deuteron spin-dependent structure function g^d_1 based on the data collected by the COMPASS experiment at CERN during the years 2002-2004. The data provide an accurate...
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
Search for the $\phi (1860)$ Pentaquark at COMPASS (2005)
Ageev, E S, Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Badeek, B, ...
Narrow Xi-pi+- and Xi-bar+pi+- resonances produced by quasi-real photons have been searched for by the COMPASS experiment at CERN. The study was stimulated by the recent observation of an exotic...
Search for the $\phi (1860)$ Pentaquark at COMPASS (2005)
Ageev, E S, Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Badeek, B, ...
Narrow Xi-pi+- and Xi-bar+pi+- resonances produced by quasi-real photons have been searched for by the COMPASS experiment at CERN. The study was stimulated by the recent observation of an exotic...
Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Badeek, B, Balestra, F, ...
First measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarized 6-LiD target are presented. The data were taken...
Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Badeek, B, Balestra, F, ...
First measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarized 6-LiD target are presented. The data were taken...
Measurement of the Spin Structure of the Deuteron in the DIS Region (2005)
Ageev, E S, Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Badeek, B, ...
We present a new measurement of the longitudinal spin asymmetry A_1^d and the spin-dependent structure function g_1^d of the deuteron in the range 1 GeV^2 < Q^2 < 100 GeV^2 and 0.004< x
Measurement of the Spin Structure of the Deuteron in the DIS Region (2005)
Ageev, E S, Alexakhin, V Yu, Alexandrov, Yu A, Alexeev, G D, Amoroso, A, Badeek, B, ...
We present a new measurement of the longitudinal spin asymmetry A_1^d and the spin-dependent structure function g_1^d of the deuteron in the range 1 GeV^2 < Q^2 < 100 GeV^2 and 0.004< x
Adeva, B., Arik, E., Arvidson, A., Badeek, 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...
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...
Adeva, B., Arik, E., Arvidson, A., Badeek, 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...
Adeva, B., Arik, E., Arvidson, A., Badeek, 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...
VUV Absorbing Vapours in n-Perfluorocarbons (2003)
Albrecht, E, Baum, G, Bellunato, T F, Bressan, A, Dalla Torre, S, D'Ambrosio, C, ...
The optical transparency of perfluorocarbons used as Cherenkov media is of prime importance to many Ring Imaging Cherenkov detectors. We will in this paper show that the main photon absorbers in...
The COMPASS Experiment and the measurement of the gluon polarisation (2001)
COMPASS, a new fixed target experiment at CERN, aimed at the study of nucleon spin structure and hadron spectroscopy, has started to collect physics data in Autumn 2001. This paper describes the...
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...
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...
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...
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...
A Line-shape analysis for spin-1 NMR signals (1997)
Dulya, C M, Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, ...
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...
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...
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...
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...
A new measurement of the spin-dependent structure function $g_{1}(x)$ of the deuteron (1995)
Adams, D, Adeva, B, Arik, E, Arvidson, A, Badelek, B, Ballintijn, M K, ...
Enhancement of nuclear polarization with frequency modulated microwaves (1995)
Adeva, B, Arik, E, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, ...
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
Measurement of the deuteron polarization in a large target (1994)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
Measurement of the polarisation of a high-energy muon beam (1993)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
Combined analysis of world data on nucleon spin structure functions (1993)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
Measurement of the spin-dependent structure function g$_{1}$(x) of the deuteron (1993)
Adeva, B, Ahmad, S, Arvidson, A, Badelek, B, Ballintijn, M K, Bardin, G, ...
First measurement of $D_{0n0n}$ in $\overline{p}p$ elastic scattering (1991)
Künne, R A, Beard, C I, Birsa, R, Bos, Kors, Bradamante, Franco, Bugg, D V, ...
The limited streamer tubes for experiment PS199 at LEAR (1990)
Birsa, R, Ciliberti, P, Dalla Torre, S, Lamanna, M, Martin, A, Menon, G I, ...
Asymmetry in $\overline{p}$p elastic scattering (1990)
Künne, R A, Beard, C I, Birsa, R, Bos, Kors, Bradamante, Franco, Bugg, D V, ...
Polarization at small angles in antiproton-carbon elastic scattering at LEAR energies (1990)
Martin, A, Birsa, R, Bos, Kors, Bradamante, Franco, Bugg, D V, Dalla Torre, S, ...