Journal
PHYSICS LETTERS B
Volume 736, Issue -, Pages 124-131Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2014.06.080
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- CERN management and staff
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A measurement of the azimuthal asymmetry in dihadron production in deep-inelastic scattering of muons on transversely polarised proton (NH3) targets is presented. They provide independent access to the transversity distribution functions through the measurement of the Collins asymmetry in single hadron production. The data were taken in the year 2010 with the COMPASS spectrometer using a 160 GeV/c muon beam of the CERN SPS, increasing by a factor of about four the overall statistics with respect to the previously published data taken in the year 2007. The measured sizeable asymmetry is in good agreement with the published data. An approximate equality of the Collins asymmetry and the dihadron asymmetry is observed, suggesting a common physical mechanism in the underlying fragmentation. (C) 2014 The Authors. Published by Elsevier B.V.
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