Single spin asymmetry in lepton angular distribution of Drell-Yan processes

• Published in: The journal of high energy physics Vol. 2012; no. 11
• Main Authors: Ma, J. P., Zhang, G. P.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01-11-2012; Springer Nature B.V
• Subjects: Angular distribution; Asymmetry; Classical and Quantum Gravitation; Elementary Particles; High energy physics; Leptons; Partons; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Relativity Theory; Skewed distributions; String Theory; QCD Phenomenology
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP11(2012)156

A
bstract
We study the single spin asymmetry in the lepton angular distribution of Drell-Yan processes in the framework of collinear factorization. The asymmetry has been studied in the past and different results have been obtained. In our study we take an approach different than that used in the existing study. We explicitly calculate the transverse-spin dependent part of the differential cross-section with suitable parton states. Because the spin is transverse, one has to take multi-parton states for the purpose. Our result agrees with one of the existing results. A possible reason for the disagreement with others is discussed.