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28 research outcomes, page 1 of 3
  • publication . Article . Other literature type . Preprint . 2018
    Open Access English
    Authors:
    A.A. Lednev; Laura Silva; A. Kerbizi; V.A. Polyakov; S. Sarkar; J. Bernhard; C. Chatterjee; Markus Ball; H. Suzuki; A.S. Nunes; ...
    Publisher: HAL CCSD
    Project: 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 . 2015
    Open Access
    Authors:
    M. Krämer; F. Nerling; V. Jary; D. Panzieri; M. Boer; L. Capozza; J. ter Wolbeek; R. R. Akhunzyanov; N. Horikawa; J. Bernhard; ...
    Project: 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 . 2016
    Open Access English
    Authors:
    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 . Article . 2015
    Open Access
    Authors:
    A. Pichler; Sandro Donadi; S. Di Matteo; Sergio Bertolucci; A. Scordo; M. Iliescu; Johann Marton; C. Guaraldo; D. Pietreanu; Catalina Curceanu; ...
    Publisher: IOP Publishing
    Project: EC | HADRONPHYSICS3 (283286), EC | HADRONPHYSICS2 (227431)

    In the last decades huge theoretical effort was devoted to the development of consistent theoretical models, aiming to solve the so-called "measurement problem". Among these, the Dynamical Reduction Models possess the unique characteristic to be experimentally testable,...

  • publication . Other literature type . Article . Preprint . 2015
    Open Access English
    Authors:
    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; ...
    Project: 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 . 2015
    Open Access English
    Authors:
    Adolph, C.; Akhunzyanov, R.; Alexeev, M. G.; Alexeev, G. D.; Amoroso, A.; Andrieux, V.; Anosov, V.; Austregesilo, A.; Badełek, B.; Balestra, F.; ...
    Project: 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 . 2015
    Open Access English
    Authors:
    C. Schill; D. Cotte; R. Panknin; P. Schiavon; Q. Weitzel; S. Levorato; C. Pires; W. Dünnweber; Miroslav Sulc; C. Franco; ...
    Project: 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 . 2015
    Open Access English
    Authors:
    A. Magnon; Maria Liz Crespo; A. Lehmann; M. Virius; Bernhard Franz Ketzer; Bernhard Franz Ketzer; M. Slunecka; J. Pretz; J. Pretz; S. Levorato; ...
    Project: 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 . 2018
    Open Access
    Authors:
    I. Gnesi; S. Sirtl; P. Schiavon; G. Reicherz; F. J. Klein; T. Iwata; I.A. Savin; T. Matsuda; Miroslav Sulc; P. Jörg; ...
    Project: 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 . 2018
    Open Access English
    Authors:
    J. Lichtenstadt; S. Huber; M. V. Zavertyaev; V. Jary; J. Nový; J. Nový; P. Jörg; V. Anosov; J. Smolik; D. Neyret; ...
    Project: 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 ...

28 research outcomes, page 1 of 3