Partonic Pole Matrix Elements for Fragmentation

Details Partonic Pole Matrix Elements for Fragmentation Partonic Pole Matrix Elements for Fragmentation

2008-12-19

arxiv.org/abs/0812.3783v2

Phys.Rev.Lett.102:172003,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures; minor changes, matches journal version

Scientific paper

10.1103/PhysRevLett.102.172003

A model-independent analysis of collinear three-parton correlation functions for fragmentation is performed. By investigating their support properties it is shown, in particular, that the so-called partonic pole matrix elements vanish. This sheds new light on the understanding of transverse single spin asymmetries in various hard semi-inclusive reactions. Moreover, it gives additional strong evidence for the universality of transverse-momentum-dependent fragmentation functions.

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