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CERN Document Server 12 elementer funnet  1 - 10neste  gå til element: Søket tok 0.95 sekunder. 
1.
Direct Measurement of the Gluon Polarisation in the Nucleon via Charmed Meson Production / COMPASS Collaboration
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. [...]
arXiv:0802.3023 ; IRFU-08-14 ; CERN-PH-EP-2008-003 ; CERN-PH-EP-2008-003. - 2008. - 10 p.
Preprint - Full text - Fulltext
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2.
Collins and Sivers Transverse Spin Asymmetries for Pions and Kaons on Deuterons / COMPASS Collaboration
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 results for charged pions and charged and neutral kaons correspond to all data available, which were collected from 2002 to 2004. [...]
arXiv:0802.2160; IRFU-08-15; CERN-PH-EP-2008-002; CERN-PH-EP-2008-002.- Geneva : CERN, 2009 - 14 p. - Published in : Phys. Lett. B 673 (2009) 127-135 Fulltext: PDF; External link: Preprint
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3.
The Polarised Valence Quark Distribution from semi-inclusive DIS / COMPASS Collaboration
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 polarised muon beam scattered off a large polarised 6-LiD target and cover the range 0.006 < x < 0.7 and 1 < Q^2 < 100 (GeV/c)^2. [...]
arXiv:0707.4077; CERN-PH-EP-2007-024; CERN-PH-EP-2007-024.- Geneva : CERN, 2008 - 10 p. - Published in : Phys. Lett. B 660 (2008) 458-465 Fulltext: arXiv:0707.4077 - PDF; phep-2007-024 - PDF; External link: Preprint
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4.
Double spin asymmetry in exclusive $\rho^0$ muoproduction at COMPASS / COMPASS Collaboration
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 incoherent exclusive rho^0 production on polarised deuterons. [...]
arXiv:0704.1863; CERN-PH-EP-2007-009; CERN-PH-EP-2007-009.- 2007 - 15 p. - Published in : Eur. Phys. J. C 52 (2007) 255-265 Fulltext: PDF; External link: Preprint
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5.
The COMPASS Experiment at CERN / COMPASS Collaboration
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 particles are detected in coincidence with the incoming muon or hadron. [...]
hep-ex/0703049; CERN-PH-EP-2007-001; CERN-PH-EP-2007-001.- Geneva : CERN, 2007 - 84 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 577 (2007) 455-518 Fulltext: arXiv:hep-ex_0703049 - PDF; phep-2007-001 - PDF; External link: Preprint
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6.
Spin asymmetry $A^d_1$ and the spin-dependent structure function $g^d_1$ of the deuteron at low values of $x$ and $Q^2$ / COMPASS Collaboration
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^2 and 4*10^-5 < x < 2.5*10^-2 based on the data collected by the COMPASS experiment at CERN during the years 2002 and 2003. The statistical precision is tenfold better than that of the previous measurement in this region. [...]
hep-ex/0701014; DAPNIA-07-18; CERN-PH-EP-2006-040; CERN-PH-EP-2006-040.- Geneva : CERN, 2007 - 17 p. - Published in : Phys. Lett. B 647 (2007) 330-340 Fulltext: S0370269307002419 - XML; phep-2006-040 - PDF; arXiv:hep-ex_0701014 - PDF; External link: Preprint
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7.
A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target / COMPASS Collaboration
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 were taken in 2003 and 2004 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160 GeV/c [...]
hep-ex/0610068; DAPNIA-06-341; CERN-PH-EP-2006-031; CERN-PH-EP_2006-031; CERN-PH-EP-2006-031.- Geneva : CERN, 2007 - 40 p. - Published in : Nucl. Phys. B 765 (2007) 31-70 Fulltext: phep-2006-031 - PDF; arXiv:hep-ex_0610068 - PDF; External link: Preprint
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8.
The Deuteron Spin-dependent Structure Function $g^{d}_1$ and its First Moment / COMPASS Collaboration
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 evaluation for \Gamma^d_1, the first moment of g^d_1(x), and for the matrix element of the singlet axial current, a_0. [...]
hep-ex/0609038; DAPNIA-06-234; CERN-PH-EP-2006-029; CERN-PH-EP-2006-029.- Geneva : CERN, 2007 - 16 p. - Published in : Phys. Lett. B 647 (2007) 8-17 Fulltext: phep-2006-029 - PDF; 0609038 - PDF; arXiv:hep-ex_0609038 - PDF; External link: Preprint
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9.
Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs / COMPASS Collaboration
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<1(GeV/c)^2, 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 polarized muon beam scattered on a polarized 6-LiD target. [...]
hep-ex/0511028; CERN-PH-EP-2005-049; DAPNIA-05-297; CERN-PH-EP-2005-049; DAPNIA-2005-297.- Geneva : CERN, 2006 - 10 p. - Published in : Phys. Lett. B 633 (2006) 25-32 Fulltext: arXiv:hep-ex_0511028 - PDF; 0511028 - PDF; S0370269305017132 - XML; External link: Preprint
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10.
Search for the $\phi (1860)$ Pentaquark at COMPASS / COMPASS Collaboration
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 baryonic state decaying into Xi-pi-, at a mass of 1862 MeV, interpreted as a pentaquark. [...]
hep-ex/0503033; DAPNIA-05-29; CERN-PH-EP-2005-009; CERN-PH-EP-2005-009; DAPNIA-2005-29.- Geneva : CERN, 2005 - 10 p. - Published in : Eur. Phys. J. C 41 (2005) 469-474 Fulltext: arXiv:hep-ex_0503033 - PDF; cer-002515208 - PDF; External link: Preprint - Please contact the library if you need to access this document.
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