TY - JOUR

T1 - Collins fragmentation function for pions and kaons in a spectator model

AU - Bacchetta, Alessandro

AU - Gamberg, Leonard P.

AU - Goldstein, Gary R.

AU - Mukherjee, Asmita

N1 - Funding Information:
We thank U. D'Alesio, A. Prokudin and P. Schweitzer for discussion and for providing us with the error bands from their extraction of the Collins function. The work of L.G. and G.R.G. are supported in part by the US Department of Energy under contracts DE-FG02-07ER41460 and DE-FG02-92ER40702, respectively. A.M. wishes to thank the hospitality of the DESY Theory Group, where part of the present work was carried out.

PY - 2008/1/17

Y1 - 2008/1/17

N2 - We calculate the Collins fragmentation function in the framework of a spectator model with pseudoscalar pion-quark coupling and a Gaussian form factor at the vertex. We determine the model parameters by fitting the unpolarized fragmentation function for pions and kaons. We show that the Collins function for the pions in this model is in reasonable agreement with recent parametrizations obtained by fits of the available data. In addition, we compute for the first time the Collins function for the kaons.

AB - We calculate the Collins fragmentation function in the framework of a spectator model with pseudoscalar pion-quark coupling and a Gaussian form factor at the vertex. We determine the model parameters by fitting the unpolarized fragmentation function for pions and kaons. We show that the Collins function for the pions in this model is in reasonable agreement with recent parametrizations obtained by fits of the available data. In addition, we compute for the first time the Collins function for the kaons.

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U2 - 10.1016/j.physletb.2007.09.076

DO - 10.1016/j.physletb.2007.09.076

M3 - Article

AN - SCOPUS:37549034230

VL - 659

SP - 234

EP - 243

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-2

ER -