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Single hadron asymmetries

COMPASS is a fixed polarised target experiment presently running at CERN. In 2002, 2003, and 2004 a 160 GeV/c polarised $\mu^{+}$ beam was utilized coming from SPS and scattered off a $^{6}$LiD (deuteron) target. The nucleons in the target can be polarised either longitudinally or transversely with...

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Detalles Bibliográficos
Autor principal: Horn, I
Lenguaje:eng
Publicado: 2005
Materias:
Acceso en línea:http://cds.cern.ch/record/1500466
Descripción
Sumario:COMPASS is a fixed polarised target experiment presently running at CERN. In 2002, 2003, and 2004 a 160 GeV/c polarised $\mu^{+}$ beam was utilized coming from SPS and scattered off a $^{6}$LiD (deuteron) target. The nucleons in the target can be polarised either longitudinally or transversely with respect to the $\mu^{+}$ beam. Around 20% of the running time has been dedicated to transverse polarisation measurements on the deuteron target. The final results for the Collins and the Sivers asymmetries extracted from the 2002 data are presented. Error estimates are shown for the data taken in 2003 and 2004. The COMPASS collaboration plans a run with a NH$_{3}$ (proton) target in 2006. Estimated projections for the statistical accuracy on the proton are also given.