Double-spin cos(phi) Asymmetry in Semi-inclusive Electroproduction

Details Double-spin cos(phi) Asymmetry in Semi-inclusive Electroproduction Double-spin cos(phi) Asymmetry in Semi-inclusive Electroproduction

2002-01-09

arxiv.org/abs/hep-ph/0201061v2

Phys.Lett. B532 (2002) 87-92

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 5 pages, 2 figures. Minor changes, figure modified. Final version to appear in Phys.Lett. B

Scientific paper

10.1016/S0370-2693(02)01532-0

We consider the double-spin cos(phi) asymmetry for pion electroproduction in semi-inclusive deep inelastic scattering of longitudinally polarized leptons off longitudinally polarized protons. We estimate the size of the asymmetry in the approximation where all twist-3 interaction-dependent distribution and fragmentation functions are set to zero. In that approximation at HERMES kinematics a sizable negative cos(phi) double-spin asymmetry for pi+ electroproduction is predicted.

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