Valence Quarks Polarization from COMPASS
نویسنده
چکیده
A first evaluation of the polarized valence quark distribution ∆uv(x) + ∆dv(x) from the COMPASS experiment (CERN/SPS) is presented. The data were collected by COMPASS in the years 2002–2004 using a 160 GeV polarized muon beam scattered off a large polarized LiD target and cover the range 1 < Q < 100 GeV and 0.006 < x < 0.7. The analysis is based on the difference asymmetry, A + −h − , for hadrons of opposite charges, which gives a direct access to the polarization of valence quarks.
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