2018 Impact factor 2.481
Hadrons and Nuclei
Open Access
Eur. Phys. J. A 24, s2.11-s2.14 (2005)
DOI: 10.1140/epjad/s2005-04-002-6

Strange and gluonic contributions to the nucleon spin

Jean-Marc Le Goff

CEA-Saclay, DAPNIA SPhN, France

jmlegoff@cea.fr

(Received 15 October 2004 / Published online 08 February 2005)

Abstract

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