Single transverse-spin asymmetry in Drell-Yan lepton angular distribution
نویسنده
چکیده
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 (V ) F (x1, x2). 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. PACS: 13.85.Qk,13.88.+e Typeset using REVTEX 1
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تاریخ انتشار 2008