Sivers effect and transverse single spin asymmetries in Drell-Yan processes

(2) University; Cagliari; F. Murgia (2) ((1) University; INFN; Italy; Italy); M. Anselmino (1); Torino; U. D'Alesio (2)

arxiv: hep-ph/0211198 · v1 · submitted 2002-11-13 · ✦ hep-ph

Sivers effect and transverse single spin asymmetries in Drell-Yan processes

M. Anselmino (1) , U. D'Alesio (2) , F. Murgia (2) ((1) University , INFN , Torino , Italy , (2) University , Cagliari

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classification ✦ hep-ph

keywords piontransverseasymmetriesdrell-yanpolarizedprocessessinglesivers

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Sivers asymmetry, adopted to explain transverse single spin asymmetries (SSA) observed in inclusive pion production, p(transv. polarized) p --> pion + X and p-bar(transv. polarized) p --> pion + X is used here to compute SSA in Drell-Yan processes; in this case, by considering the differential cross section in the lepton-pair invariant mass, rapidity and transverse momentum, other mechanisms which may originate SSA cannot contribute. Estimates for RHIC experiments are given.

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Sivers effect and transverse single spin asymmetries in Drell-Yan processes

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