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1.
The COMPASS Setup for Physics with Hadron Beams / COMPASS Collaboration
The main characteristics of the COMPASS experimental setup for physics with hadron beams are described. This setup was designed to perform exclusive measurements of processes with several charged and/or neutral particles in the final state. [...]
arXiv:1410.1797; CERN-PH-EP-2014-247; CERN-PH-EP-2014-247.- Geneva : CERN, 2015-04-11 - 47 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 779 (2015) 69-115 Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: arXiv:1410.1797 - PDF; CERN-PH-EP-2014-247 - PDF; External link: Preprint
2.
Measurement of the Charged-Pion Polarizability / COMPASS Collaboration
The COMPASS collaboration at CERN has investigated pion Compton scattering, $\pi^-\gamma\rightarrow \pi^-\gamma$, at centre-of-mass energy below 3.5 pion masses. The process is embedded in the reaction $\pi^-\mathrm{Ni}\rightarrow\pi^-\gamma\;\mathrm{Ni}$, which is initiated by 190 GeV pions impinging on a nickel target. [...]
arXiv:1405.6377; CERN-PH-EP-2014-109; CERN-PH-EP-2014-109.- Geneva : CERN, 2015-02-10 - 6 p. - Published in : Phys. Rev. Lett. 114 (2015) 062002 APS Open Access article: PDF; Draft (restricted): PDF; Fulltext: arXiv:1405.6377 - PDF; CERN-PH-EP-2014-109 - PDF; External link: Interactions.org article
3.
Exclusive $\rho^0$ muoproduction on transversely polarised protons and deuterons / COMPASS Collaboration
The transverse target spin azimuthal asymmetry A_UT in hard exclusive production of rho^0 mesons was measured at COMPASS by scattering 160 GeV/c muons off transversely polarised protons and deuterons. The measured asymmetry is sensitive to the nucleon helicity-flip generalised parton distributions E^q, which are related to the orbital angular momentum of quarks in the nucleon. [...]
arXiv:1207.4301; CERN-PH-EP-2012-208; CERN-PH-EP-2012-208.- Geneva : CERN, 2012-12-01 - 20 p. - Published in : Nucl. Phys. B 865 (2012) 1 Draft (restricted): PDF; Fulltext: arXiv:1207.4301 - PDF; CERN-PH-EP-2012-208 - PDF; External link: Preprint
4.
Measurement of the Cross Section for High-$p_T$ Hadron Production in Scattering of 160 GeV/c Muons off Nucleons / COMPASS Collaboration
The cross section for production of charged hadrons with high transverse momenta in scattering of 160 GeV/c muons off nucleons at low photon virtualities has been measured at the COMPASS experiment at CERN. The results, which cover transverse momenta from 1.1 to 3.6 GeV/c, are compared to a next-to-leading order perturbative Quantum Chromodynamics (NLO pQCD) calculation in order to evaluate the applicability of pQCD to this process in the kinematic domain of the experiment. [...]
arXiv:1207.2022; CERN-PH-EP-2012-189; CERN-PH-EP-2012-189.- Geneva : CERN, 2013-11-04 - 8 p. - Published in : Phys. Rev. D 88 (2013) 091101 APS published version, local copy: PDF; Draft (restricted): PDF; Fulltext: arXiv:1207.2022 - PDF; CERN-PH-EP-2012-189 - PDF; External link: Preprint
5.
Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Sivers asymmetries / COMPASS Collaboration
The COMPASS Collaboration at CERN has measured the transverse spin azimuthal asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a 160 GeV positive muon beam and a transversely polarised NH_3 target. The Sivers asymmetry of the proton has been extracted in the Bjorken x range 0.003<x<0.7. [...]
arXiv:1205.5122; CERN-PH-EP-2012-147; CERN-PH-EP-2012-147.- Geneva : CERN, 2012-10-31 - 7 p. - Published in : Phys. Lett. B 717 (2012) 383 Draft (restricted): PDF; Fulltext: S0370269312010039 - XML; arXiv:1205.5122 - PDF; CERN-PH-EP-2012-147 - PDF;
6.
Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Collins asymmetries / COMPASS Collaboration
The COMPASS Collaboration at CERN has measured the transverse spin azimuthal asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a 160 GeV positive muon beam and a transversely polarised NH_3 target. The Collins asymmetry of the proton was extracted in the Bjorken x range 0.003<x<0.7. [...]
arXiv:1205.5121; CERN-PH-EP-2012-146; CERN-PH-EP-2012-146.- Geneva : CERN, 2012-10-31 - 11 p. - Published in : Phys. Lett. B 717 (2012) 376 Draft (restricted): PDF; Fulltext: arXiv:1205.5121 - PDF; CERN-PH-EP-2012-146 - PDF; External link: DURHAM
7.
Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering / COMPASS collaboration
First measurements of azimuthal asymmetries in hadron-pair production in deep-inelastic scattering of muons on transversely polarised ^6LiD (deuteron) and NH_3 (proton) targets are presented. The data were taken in the years 2002-2004 and 2007 with the COMPASS spectrometer using a muon beam of 160 GeV/c at the CERN SPS. [...]
arXiv:1202.6150; CERN-PH-EP-2012-053; CERN-PH-EP-2012-053.- Geneva : CERN, 2012-06-18 - 13 p. - Published in : Phys. Lett. B 713 (2012) 10-16 Draft (restricted): PDF; Fulltext: arXiv:1202.6150 - PDF; S0370269312005321 - XML; CERN-PH-EP-2012-053 - PDF;
8.
Leading order determination of the gluon polarisation from DIS events with high-$p_T$ hadron pairs / COMPASS Collaboration
We present a determination of the gluon polarisation Delta g/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised ^6LiD target. [...]
arXiv:1202.4064; CERN-PH-EP-2012-010; CERN-PH-EP-2012-010.- Geneva : CERN, 2013-01-08 - 13 p. - Published in : Phys. Lett. B 718 (2013) 922-930 Draft (restricted): PDF; Fulltext: CERN-PH-EP-2012-010 - PDF; arXiv:1202.4064 - PDF; External link: Preprint
9.
First Measurement of Chiral Dynamics in $\pi^-\gamma \to \pi^-\pi^-\pi^+$ / COMPASS Collaboration
The COMPASS collaboration at CERN has investigated the $\pi^-\gamma \to \pi^-\pi^-\pi^+$ reaction at center-of-momentum energy below five pion masses, $\sqrt{s} \lt 5m_\pi$ , embedded in the Primakoff reaction of 190 GeV pions impinging on a lead target. Exchange of quasi-real photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, $t' \lt 0.001 GeV^2/c^2$. [...]
arXiv:1111.5954; CERN-PH-EP-2011-176; CERN-PH-EP-2011-176.- Geneva : CERN, 2012-11-05 - 10 p. - Published in : Phys. Rev. Lett. 108 (2012) 192001 APS Published version, local copy: PDF; Draft (restricted): PDF; Fulltext: arXiv:1111.5954 - PDF; CERN-PH-EP-2011-176 - PDF; External link: Preprint
10.
Quark helicity distributions from longitudinal spin asymmetries in muon-proton and muon-deuteron scattering / COMPASS Collaboration
Double-spin asymmetries for production of charged pions and kaons in semi-inclusive deep-inelastic muon scattering have been measured by the COMPASS experiment at CERN. The data, obtained by scattering a 160 GeV muon beam off a longitudinally polarised NH_3 target, cover a range of the Bjorken variable x between 0.004 and 0.7. [...]
arXiv:1007.4061; CERN-PH-EP-2010-023; CERN-PH-EP-2010-023.- Geneva : CERN, 2010 - 13 p. - Published in : Phys. Lett. B 693 (2010) 227-235 Fulltext: arXiv:1007.4061 - PDF; CERN-PH-EP-2010-023 - PDF; External link: Preprint

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