期刊
PHYSICS LETTERS B
卷 685, 期 1, 页码 95-103出版社
ELSEVIER
DOI: 10.1016/j.physletb.2009.12.067
关键词
Transverse momentum parton distributions; Final state interactions
资金
- Institute For Nuclear Theory
- University of Washington
- U.S. Department of Energy [DE-FG02-07ER41460, DE-AC05-06OR23177]
In the factorized picture of semi-inclusive hadronic processes the naive time-reversal odd parton distributions exist by virtue of the gauge link which renders it color gauge invariant. The link characterizes the dynamical effect of initial/final-state interactions of the active parton due soft gluon exchanges with the target remnant. Though these interactions are non-perturbative, studies of final-state interaction have been approximated by perturbative one-gluon approximation in Abelian models. We include higher-order gluonic contributions from the gauge link by applying non-perturbative eikonal methods incorporating color degrees of freedom in a calculation of the Boer-Mulders function of the pion. Using this framework we explore under what conditions the Boer-Mulders function can be described in terms of factorization of final state interactions and a spatial distribution in impact parameter space. (C) 2010 Elsevier B.V. All rights reserved.
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