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Momentum sum rules for fragmentation functions

Meissner, S
; 
Metz, A
; 
Pitonyak, D
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Journal Article
Date
2010-06-21
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Subject
Transverse momentum dependent parton correlators
 Fragmentation functions
 Sum rules
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http://hdl.handle.net/20.500.12613/6054
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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. © 2010 Elsevier B.V. All rights reserved.
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Elsevier BV
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
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