Momentum sum rules for fragmentation functions
arXiv:1002.4393 · doi:10.1016/j.physletb.2010.05.037
Abstract
Momentum sum rules for fragmentation functions are considered. In particular, we give a general proof of the Schäfer-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.
12 pages; v2: Eqs. (44,46) added, minor additional changes, to appear in Phys. Lett. B
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- Machine learning-based jet and event classification at the Electron-Ion Collider with applications to hadron structure and spin physics
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