Model study of generalized parton distributions with helicity flip

Details Model study of generalized parton distributions with helicity flip Model study of generalized parton distributions with helicity flip

2005-09-26

arxiv.org/abs/hep-ph/0509287v2

Phys.Rev. D72 (2005) 117502

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 4 figures; shortened version accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.72.117502

Generalized parton distributions with helicity flip are studied in the quark sector, within a simple version of the MIT bag model, assuming an SU(6) wave function for the proton target. In the framework under scrutiny it turns out that only the generalized transversity distribution, H_T^q, is non vanishing. For this quantity, the forward limit is properly recovered and numerical results are found to underestimate recent lattice data for its first moment. Positivity bounds recently proposed are fulfilled by the obtained distribution. The relevance of the analysis for the planning of measurements of the quark generalized transversity is addressed.

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