CERN Accelerating science

CERN Document Server 28 のレコードが見つかりました。  1 - 10次最後  レコードへジャンプ: 検索にかかった時間: 0.55 秒 
1.
Leading and Next-to-Leading Order Gluon Polarization in the Nucleon and Longitudinal Double Spin Asymmetries from Open Charm Muoproduction / COMPASS collaboration
The gluon polarisation in the nucleon was measured using open charm production by scattering 160 GeV/c polarised muons off longitudinally polarised protons or deuterons. The data were taken by the COMPASS collaboration between 2002 and 2007. [...]
arXiv:1211.6849; CERN-PH-EP-2012-350; CERN-PH-EP-2012-350.- Geneva : CERN, 2013-03-25 - 22 p. - Published in : Phys. Rev. D 87 (2013) 052018 APS published version, local copy: PDF; Draft (restricted): PDF; Fulltext: CERN-PH-EP-2012-350 - PDF; arXiv:1211.6849 - PDF; External link: Preprint
2.
D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c / COMPASS Collaboration
The production of D* and D mesons in inelastic scattering of 160 GeV/c muons off a $^6$LiD target has been investigated with the COMPASS spectrometer at CERN for 0.003 (GeV/c)$^2 < Q^2 < 10$ (GeV/c)$^2$ and 3x10$^-5< x_{Bj}$ < 0.1. The study is based on 8100 events where a $D^0$ or anti $D^0$ is detected subsequently to a $D^{*+}$ or $D^{*-}$ decay, and on 34000 events, where only a $D^0$ or anti $D^0$ is detected. [...]
arXiv:1211.1575; CERN-PH-EP-2012-339; CERN-PH-EP-2012-339.- Geneva : CERN, 2012-12-11 - 22 p. - Published in : Eur. Phys. J. C 72 (2012) 2253 Draft (restricted): PDF; Fulltext: arXiv:1211.1575 - PDF; CERN-PH-EP-2012-339 - PDF; Springer Open Access article: PDF; External link: Preprint
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.
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
8.
Azimuthal asymmetries of charged hadrons produced by high-energy muons scattered off longitudinally polarised deuterons / COMPASS Collaboration
Azimuthal asymmetries in semi-inclusive production of positive (h^+) and negative hadrons (h^-) have been measured by scattering 160 GeV muons off longitudinally polarised deuterons at CERN. The asymmetries were decomposed in several terms according to their expected modulation in the azimuthal angle phi of the outgoing hadron. [...]
arXiv:1007.1562; CERN-PH-EP-2010-018; CERN-PH-EP-2010-018.- Geneva : CERN, 2010 - 12 p. - Published in : Eur. Phys. J. C 70 (2010) 39-49 Fulltext: CERN-PH-EP-2010-018 - PDF; arXiv:1007.1562 - PDF; External link: Preprint
9.
Measurement of the Collins and Sivers asymmetries on transversely polarised protons / COMPASS Collaboration
The Collins and Sivers asymmetries for charged hadrons produced in deeply inelastic scattering on transversely polarised protons have been extracted from the data collected in 2007 with the CERN SPS muon beam tuned at 160 GeV/c. At large values of the Bjorken x variable non-zero Collins asymmetries are observed both for positive and negative hadrons while the Sivers asymmetry for positive hadrons is slightly positive over almost all the measured x range. [...]
arXiv:1005.5609; CERN-PH-EP-2010-013; CERN-PH-EP-2010-013.- 2010 - 9 p. - Published in : Phys. Lett. B 692 (2010) 240-246 Fulltext: PDF; External link: DURHAM
10.
The Spin-dependent Structure Function of the Proton $g_{1}^p$ and a Test of the Bjorken Sum Rule / COMPASS Collaboration
The inclusive double-spin asymmetry, $A_{1}^{p}$, has been measured at COMPASS in deepinelastic polarised muon scattering off a large polarised NH3 target. The data, collected in the year 2007, cover the range Q2 > 1 (GeV/c)^2, 0.004 < x < 0.7 and improve the statistical precision of g_{1}^{p}(x) by a factor of two in the region x < 0.02. [...]
arXiv:1001.4654; CERN-PH-EP-2010-001; CERN-PH-EP-2010-001.- 2010 - 12 p. - Published in : Phys. Lett. B 690 (2010) 466-472 Fulltext: CERN-PH-EP-2010-001 - PDF; arXiv:1001.4654 - PDF; External link: Preprint

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