New COMPASS results on Collins and Sivers asymmetries

Bradamante, F. (2012) New COMPASS results on Collins and Sivers asymmetries. Il nuovo cimento C, 35 (2). pp. 107-114. ISSN 1826-9885

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The study of transverse-spin and transverse-momentum effects is an important part of the scientific program of COMPASS, a fixed-target experiment at the CERN SPS. For these studies a 160 GeV/c momentum muon beam is scattered on a transversely polarized nucleon target, and the scattered muon and the forward going hadrons produced in DIS processes are reconstructed and identified in a magnetic spectrometer. The measurements have been performed on a deuteron target in 2002, 2003 and 2004, and on a proton target in 2007 and 2010. The results obtained for the Collins and Sivers asymmetries from the data collected in 2010 are here presented for the first time. They nicely confirm the findings of the 2007 run and allow for reduction of the errors by more than a factor of two.

Item Type: Article
Uncontrolled Keywords: Photon and charged-lepton interactions with hadrons ; Polarization in interactions and scattering ; Light quarks
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 16 Apr 2020 16:56
Last Modified: 16 Apr 2020 16:56

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