Drell-Yan processes, transversity and light-cone wavefunctions

Details Drell-Yan processes, transversity and light-cone wavefunctions Drell-Yan processes, transversity and light-cone wavefunctions

2006-12-08

arxiv.org/abs/hep-ph/0612094v2

Phys.Rev.D76:034020,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 7 figures; version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.034020

The unpolarized, helicity and transversity distributions of quarks in the proton are calculated in the overlap representation of light-cone wavefunctions truncated to the lowest order Fock-space components with three valence quarks. The three distributions at the hadronic scale satisfy an interesting relation consistent with the Soffer inequality. Results are derived in a relativistic quark model including radiative corrections up to the next-to-leading order. Predictions for the double transverse-spin asymmetry in Drell-Yan dilepton production initiated by proton-antiproton collisions are presented. Asymmetries of about 20-30% are found in the kinematic conditions of the PAX experiment.

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