Accessing transversity via J/Psi production in polarized p-pbar interactions

Details Accessing transversity via J/Psi production in polarized p-pbar interactions Accessing transversity via J/Psi production in polarized p-pbar interactions

2004-03-10

arxiv.org/abs/hep-ph/0403114v2

Phys.Lett. B594 (2004) 97-104

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures. Version accepted for publication in PLB; comments and references added

Scientific paper

10.1016/j.physletb.2004.05.029

We discuss the possibility of a direct access to transversity distributions by measuring the double transverse spin asymmetry A_TT in p pbar --> J/Psi + X --> l^- l^+ + X processes at future GSI-HESR experiments with polarized protons and anti-protons. In the J/Psi resonance production region, with 30 < s < 45 GeV^2, both the cross-section and A_TT are expected to be sufficiently large to allow a measurement of h_1^q(x,M^2); numerical estimates are given.

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