The Dilepton QT Spectrum in Transversely Polarized Drell-Yan Process in QCD
Hiroyuki Kawamura, Jiro Kodaira, Hirotaka Shimizu, Kazuhiro Tanaka
Abstract
We discuss the transverse momentum QT distribution of Drell-Yan pair, produced in collisions of transversely polarized protons. We calculate the transversely polarized Drell-Yan cross section up to order αs in the dimensional regularization scheme, which gives QCD prediction at large QT. For small QT region, we include all-orders resummation of large logarithms due to emission of soft gluons up to next-to-leading logarithmic accuracy. At intermediate QT region, the resummation formula is matched with the fixed-order αs perturbative results in a systematic way, so that we derive the cross section with uniform accuracy over the entire range of QT.
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