Strange and gluonic contributions to the nucleon spinJean-Marc Le Goff
CEA-Saclay, DAPNIA SPhN, France
(Received 15 October 2004 / Published online 08 February 2005)
Inclusive deep inelastic scattering (DIS) experiments lead to a small contribution of the quark spins to the nucleon spin and a negative contribution from strange quarks. Historically this triggered the interest in measuring strange form factors. However, the result of these inclusive experiments has to be reinterpreted taking into account the axial anomaly in QCD, which depends on the gluon contribution to the nucleon spin. The COMPASS experiment at CERN and experiments at RHIC are going to measure this gluonic contribution.
PACS: 13.60.Hb Total and inclusive cross sections (including deep-inelastic processes) - 13.60.Le Meson production
© Società Italiana di Fisica, Springer-Verlag 2005