- publication . Article . Other literature type . Preprint . 2018Open Access EnglishAuthors:A.A. Lednev; Laura Silva; A. Kerbizi; V.A. Polyakov; S. Sarkar; J. Bernhard; C. Chatterjee; Markus Ball; H. Suzuki; A.S. Nunes; ...handle: 10400.26/34017Publisher: HAL CCSDProject: EC | HADRONPHYSICS3 (283286), NSF | A Program of Medium Energ... (1506416)
We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $\mu^+$ and $\mu^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured $...
- publication . Article . Other literature type . Preprint . 2015Open AccessAuthors:M. Krämer; F. Nerling; V. Jary; D. Panzieri; M. Boer; L. Capozza; J. ter Wolbeek; R. R. Akhunzyanov; N. Horikawa; J. Bernhard; ...handle: 10400.26/26669Project: FCT | CERN/FP/116376/2010 (116376), FCT | CERN/FP/123600/2011 (123600), EC | HADRONPHYSICS3 (283286), FCT | CERN/FP/109323/2009 (109323)
Measurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off transversely polarised protons are presented. The results were obtained using all the availab...
- publication . Article . Other literature type . Preprint . 2016Open Access EnglishAuthors:E. M. Kabuß; P. Zavada; C.D.R. Azevedo; S. Dalla Torre; W. Eyrich; M. Quaresma; G. Sbrizzai; F. Bradamante; T. Sawada; N. Horikawa; ...Publisher: North-Holland Publ. Co.Project: EC | HADRONPHYSICS3 (283286)
Exclusive production of $\omega$ mesons was studied at the COMPASS experiment by scattering $160~\mathrm{GeV}/\mathit{c}$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured in the range of photon virtuali...
- publication . Other literature type . Article . Preprint . 2015Open Access EnglishAuthors:Subir Sarkar; N. du Fresne von Hohenesche; O.Yu. Denisov; F. Haas; S. Dasgupta; D.V. Peshekhonov; V.N. Kolosov; R. Jahn; H. Suzuki; A.S. Nunes; ...handle: 10400.26/26894Project: FCT | CERN/FP/116376/2010 (116376), FCT | CERN/FP/123600/2011 (123600), EC | HADRONPHYSICS3 (283286), FCT | CERN/FP/109323/2009 (109323)
In the fragmentation of a transversely polarized quark several left-right asymmetries are possible for the hadrons in the jet. When only one unpolarized hadron is selected, it exhibits an azimuthal modulation known as Collins effect. When a pair of oppositely charged ha...
- publication . Article . Other literature type . Preprint . 2015Open Access EnglishAuthors:Adolph, C.; Akhunzyanov, R.; Alexeev, M. G.; Alexeev, G. D.; Amoroso, A.; Andrieux, V.; Anosov, V.; Austregesilo, A.; Badełek, B.; Balestra, F.; ...handle: 10400.26/26595Project: FCT | CERN/FP/116376/2010 (116376), FCT | CERN/FP/123600/2011 (123600), FCT | CERN/FP/109323/2009 (109323), EC | HADRONPHYSICS3 (283286)
Comment: Published version: 9 pages, 3 figures, 1 table
- publication . Article . Other literature type . Preprint . 2015Open Access EnglishAuthors:C. Schill; D. Cotte; R. Panknin; P. Schiavon; Q. Weitzel; S. Levorato; C. Pires; W. Dünnweber; Miroslav Sulc; C. Franco; ...handle: 10400.26/26701Project: FCT | CERN/FP/116376/2010 (116376), FCT | CERN/FP/123600/2011 (123600), EC | HADRONPHYSICS3 (283286), FCT | CERN/FP/109323/2009 (109323)
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. Making use of a large part of...
- publication . Article . Other literature type . Preprint . 2015Open Access EnglishAuthors:A. Magnon; Maria Liz Crespo; A. Lehmann; M. Virius; Bernhard Franz Ketzer; Bernhard Franz Ketzer; M. Slunecka; J. Pretz; J. Pretz; S. Levorato; ...pmid: 26340182Project: FCT | CERN/FP/116376/2010 (116376), FCT | CERN/FP/123600/2011 (123600), FCT | CERN/FP/109323/2009 (109323), EC | HADRONPHYSICS3 (283286)
The COMPASS collaboration at CERN has measured diffractive dissociation of 190 GeV/$c$ pions into the $\pi^-\pi^-\pi^+$ final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of $3\pi$ mass and four-momentum transfer using th...
- publication . Article . Other literature type . Preprint . 2018Open AccessAuthors:I. Gnesi; S. Sirtl; P. Schiavon; G. Reicherz; F. J. Klein; T. Iwata; I.A. Savin; T. Matsuda; Miroslav Sulc; P. Jörg; ...handle: 10400.26/27466Project: EC | HADRONPHYSICS3 (283286), NSF | A Program of Medium Energ... (1506416)
We present a precise measurement of the proton longitudinal double-spin asymmetry $A_1^{\rm p}$ and the proton spin-dependent structure function $g_1^{\rm p}$ at photon virtualities $0.006~({\rm GeV}/c)^2<Q^2 < 1~({\rm GeV}/c)^2$ in the Bjorken $x$ range of $4 \times 10...
- publication . Preprint . Article . Other literature type . 2018Open Access EnglishAuthors:J. Lichtenstadt; S. Huber; M. V. Zavertyaev; V. Jary; J. Nový; J. Nový; P. Jörg; V. Anosov; J. Smolik; D. Neyret; ...handle: 10400.26/27565Project: EC | HADRONPHYSICS3 (283286), NSF | A Program of Medium Energ... (1506416)
The K$^{-}$ over K$^{+}$ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction $z$ of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar ...
- publication . Article . Preprint . Other literature type . 2017Open Access EnglishAuthors:A. Efremov; Yu.I. Ivanshin; I. J. Choi; P. Kremser; K. Königsmann; R. Heitz; D. von Harrach; Bakur Parsamyan; W.-D. Nowak; V. Frolov; ...handle: 10400.26/27166Project: EC | HADRONPHYSICS3 (283286)
Comment: 10 pages, 9 figures
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