Twist-3 and Quark Mass Contributions to the Polarized Nucleon Structure Function g_2(x,Q^2)

Details Twist-3 and Quark Mass Contributions to the Polarized Nucleon Structure Function g_2(x,Q^2) Twist-3 and Quark Mass Contributions to the Polarized Nucleon Structure Function g_2(x,Q^2)

1997-12-13

arxiv.org/abs/hep-ph/9712366v3

Phys.Lett. B430 (1998) 186-194

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, Revtex, a typographical error has been eliminated

Scientific paper

10.1016/S0370-2693(98)00451-1

Quark mass effects are clarified in the parton model approach to the transversely polarized nucleon structure function. The special propagator technique is employed to obtain manifestly gauge invariant results and extract the buried short-distance contributions inside the soft part after momentum factorization in the collinear expansion approach. A generalized massive special propagator for a massive quark is constructed. We identify the corresponding matrix elements of the transversely polarized structure function in deep inelastic scatterings by the massive special propagator technique.

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