Momentum sum rules for fragmentation functions

Details Momentum sum rules for fragmentation functions Momentum sum rules for fragmentation functions

2010-02-23

arxiv.org/abs/1002.4393v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages; v2: Eqs. (44,46) added, minor additional changes, to appear in Phys. Lett. B

Scientific paper

Momentum sum rules for fragmentation functions are considered. In particular,
we give a general proof of the Sch\"afer-Teryaev sum rule for the transverse
momentum dependent Collins function. We also argue that corresponding sum rules
for related fragmentation functions do not exist. Our model-independent
analysis is supplemented by calculations in a simple field-theoretical model.

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