CERN Accelerating science

Article
Report number arXiv:1401.7873 ; CERN-PH-EP-2014-013 ; CERN-PH-EP-2014-013
Title A high-statistics measurement of transverse spin effects in dihadron production from muon-proton semi-inclusive deep-inelastic scattering
Author(s) COMPASS Collaboration  Show all 221 authors
Publication 2014-09-07
Imprint 29 Jan 2014
Number of pages 8
Note Comments: 14 pages, 8 figures
14 pages, 8 figures
In: Phys. Lett. B 736 (2014) 124-131
DOI 10.1016/j.physletb.2014.06.080
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; COMPASS NA58
Free keywords QCD ; experimental results ; SIDIS ; transversity ; 2 hadrons asymmetries
Abstract A measurement of the azimuthal asymmetry in dihadron production in deep-inelastic scattering of muons on transversely polarised proton (NH3) targets are 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 160GeV/c muon beam of the CERN SPS, increasing by a factor of about three the available statistics of 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.
Copyright/License publication: © 2014-2025 The Author(s) (License: CC-BY-3.0), sponsored by SCOAP³
preprint: © 2014-2025 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: andrea.bressan@cern.ch


 Record created 2014-01-24, last modified 2024-05-08


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