The Collins function: a simple model calculation

Details The Collins function: a simple model calculation The Collins function: a simple model calculation

2001-02-22

arxiv.org/abs/hep-ph/0102278v2

Phys.Lett. B506 (2001) 155-160

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex, 4 pages, 4 figures, two references added, to be published on Physics Letters B

Scientific paper

10.1016/S0370-2693(01)00388-4

The Collins function belongs to the class of the so-called time-reversal odd fragmentation functions. Being chiral-odd as well, it can serve as an important tool to observe the nucleon's transversity distribution in semi-inclusive DIS. Due to the possible presence of final state interactions, this function can be non-zero, though this has never been demonstrated in an explicit model calculation. We use a simple pseudoscalar coupling between pions and quarks to model the fragmentation process and we show that the inclusion of one-loop corrections generates a non-vanishing Collins function, therefore giving support to its existence from the theoretical point of view.

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