Measurements of Collins and Sivers asymmetries at COMPASS

Details Measurements of Collins and Sivers asymmetries at COMPASS Measurements of Collins and Sivers asymmetries at COMPASS

2005-01-14

arxiv.org/abs/hep-ex/0501035v2

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 1 figure, presented at SPIN2004 International Symphosium, October 10-16 2004, Trieste, Italy

Scientific paper

COMPASS is a fixed target experiment presently running at CERN. In 2002, 2003, and 2004 the experiment used a 160 GeV polarized muon beam coming from SPS and scattered off a $^6$LiD target. The nucleons in the target can be polarized either longitudinally or transversely with respect to the muon beam and 20% of the running time has been devoted to transverse polarization. From the transverse polarization data collected in 2002, which correspond to a total integrated luminosity of about 200 pb$^{-1}$, the Collins and the Sivers asymmetries have been determined separately and the preliminary results are presented here.

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