Single transverse-spin asymmetry in Drell-Yan lepton angular distribution

Details Single transverse-spin asymmetry in Drell-Yan lepton angular distribution Single transverse-spin asymmetry in Drell-Yan lepton angular distribution

2001-08-22

arxiv.org/abs/hep-ph/0108179v1

Phys.Rev. D65 (2002) 034008

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, Revtex, 5 Postscript figures, uses aps.sty, epsfig.sty

Scientific paper

10.1103/PhysRevD.65.034008

We calculate a single transverse-spin asymmetry for the Drell-Yan lepton-pair's angular distribution in perturbative QCD. At leading order in the strong coupling constant, the asymmetry is expressed in terms of a twist-3 quark-gluon correlation function T_F^{(V)}(x_1,x_2). In our calculation, the same result was obtained in both light-cone and covariant gauge in QCD, while keeping explicit electromagnetic current conservation for the virtual photon that decays into the lepton pair. We also present a numerical estimate of the asymmetry and compare the result to an existing other prediction.

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