Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-02-22
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.
Bacchetta Alessandro
Kundu Rajen
Metz Andreas
Mulders Piet J.
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