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Partonic pole matrix elements for fragmentation

Meißner, S
; 
Metz, A
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Journal Article
Date
2009-05-01
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hep-ph
 hep-ph
 hep-ex
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http://hdl.handle.net/20.500.12613/6075
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0812.3783v2.pdf
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DOI
10.1103/PhysRevLett.102.172003
Abstract
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. © 2009 The American Physical Society.
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American Physical Society (APS)
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Physical Review Letters
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