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CERN Document Server 19 записей найдено  1 - 10следующий  перейти к записи: Поиск длился 1.37 секунд. 
1.
Measurement of transversity signals in two hadron production at COMPASS / Massmann, Frank (Bonn U., HISKP) /on behalf of the COMPASS Collaboration
The quark structure of the nucleon at the twist two level can be completely described with three quark distribution functions: the spin averaged distribution function $q(x)$, the helicity distribution $\Delta q(x)$ and the transverse spin distribution $\Delta_{T}q(x)$. This last function, referred to as transversity, is chiral-odd and can only be measured in combination with another chiral-odd function. [...]
2008 - 4 p. - Published in : Eur. Phys. J. Spec. Top. 162 (2008) 85-88 Fulltext: PDF;
In : Symmetries and Spin, Prague, Czech Republic, 8 - 14 Jul 2007, pp.85-88
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2.
Measurement of transverse spin effects via two-hadron correlations at the COMPASS experiment / Massmann, F
Die Quark–Struktur des Nukleons lässt sich bei Vernachlässigung intrinsischer Quarktransversalimpulse vollständig durch drei Quark Verteilungsfunktionen beschreiben [...]
CERN-THESIS-2008-181 - 111 p.

Fulltext - Full text
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3.
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;
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4.
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
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5.
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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6.
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
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7.
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
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8.
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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9.
Observation of a $J^{PC} = 1^{-+}$ exotic resonance in diffractive dissociation of 190 GeV/c $\pi^{-}$ into $\pi^- \pi^- \pi^+$ / COMPASS collaboration
The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the pi- pi- pi+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420000 events taken at values of the squared 4-momentum transfer t' between 0.1 and 1 GeV^2/c^2. [...]
arXiv:0910.5842; CERN-PH-EP-2009-018; CERN-PH-EP-2009-018.- 2010 - 10 p. - Published in : Phys. Rev. Lett. 104 (2010) 241803 APS Published version, local copy: PDF; Fulltext: cern-ph-ep_2009-018 - PDF; arXiv:0910.5842 - PDF; External link: Preprint
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10.
Measurement of the Longitudinal Spin Transfer to Lambda and Anti-Lambda Hyperons in Polarised Muon DIS / COMPASS collaboration
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 at CERN. The spin transfers to lambda and anti-lambda produced in the current fragmentation region exhibit different behaviours as a function of x and xF . [...]
arXiv:0907.0388; CERN-PH-EP-2009-011; CERN-PH-EP-2009-011.- Geneva : CERN, 2009 - 13 p. - Published in : Eur. Phys. J. C 64 (2009) 171-179 Fulltext: arXiv:0907.0388 - PDF; 10052_2009_1143_OnlinePDF - PDF; Springer Open Access article: PDF; External link: DURHAM
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CERN Document Server : 19 записей найдено   1 - 10следующий  перейти к записи:
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3 Massmann, F
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