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
SN - 0370-2693
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
IS - 1-2
ER -