Reviewing model calculations of the Collins fragmentation function

Details Reviewing model calculations of the Collins fragmentation function Reviewing model calculations of the Collins fragmentation function

2005-04-15

arxiv.org/abs/hep-ph/0504124v1

Phys.Rev. D71 (2005) 114018

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1103/PhysRevD.71.114018

The Collins fragmentation function describes a left/right asymmetry in the fragmentation of a transversely polarized quark into a hadron in a jet. Four different model calculations of the Collins function have been presented in the literature. While based on the same concepts, they lead to different results and in particular to different signs for the Collins function. The purpose of the present work is to review the features of these models and correct some errors made in previous calculations. A full study of the parameter dependence and the possible modifications to these models is beyond the scope of the paper. However, some general conclusions are drawn.

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