A Proof of Factorization Theorem of Drell-Yan Process at Operator LevelSupported by the National Natural Science Foundation of China under Grant No. 11275242

An alternative proof of factorization theorem for Drell-Yan process that works at operator level is presented in this paper. Contributions of interactions after the hard collision for such inclusive processes are proved to be canceled at operator level according to the unitarity of time evolution op...

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Bibliographic Details
Published in:Communications in theoretical physics 2016-02, Vol.65 (2), p.193-203
Main Author: Zhou, Gao-Liang
Format: Article
Language:English
Subjects:
Drell-Yan process
QCD factorization
Online Access:Get full text
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Summary:An alternative proof of factorization theorem for Drell-Yan process that works at operator level is presented in this paper. Contributions of interactions after the hard collision for such inclusive processes are proved to be canceled at operator level according to the unitarity of time evolution operator. After this cancellation, there are no longer leading pinch singular surface in Glauber region in the time evolution of electromagnetic currents. Effects of soft gluons are absorbed into Wilson lines of scalar-polarized gluons. Cancelation of soft gluons is attribute to unitarity of time evolution operator and such Wilson lines.
ISSN:0253-6102
DOI:10.1088/0253-6102/65/2/193