Sivers and Collins effects in polarized pp scattering processes

(2) University of Cagliari (Italy); 3); (3) INFN; (4) Imperial College; Cagliari; E. Leader (4); F. Murgia (3) ((1) University; INFN; Italy; London

arxiv: 0809.3743 · v1 · pith:N4LRRE5Rnew · submitted 2008-09-22 · ✦ hep-ph

Sivers and Collins effects in polarized pp scattering processes

M. Anselmino (1) , M. Boglione (1) , U. D'Alesio (2 , 3) , E. Leader (4) , S. Melis (1) , F. Murgia (3) ((1) University , INFN

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Torino Italy (2) University of Cagliari (Italy) (3) INFN Cagliari (4) Imperial College London U.K.)

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classification ✦ hep-ph

keywords collinseffectspolarizedprocessessiversasymmetriescollisionsdata

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We summarize the present phenomenology of Sivers and Collins effects for transverse single spin asymmetries in polarized proton-proton collisions within the framework of the generalized parton model (GPM). We will discuss a reassessment of the Collins effect and some preliminary predictions for SSA's in p(pol) p -> pi,K + X processes at RHIC obtained using updated information from SIDIS data and a new set of meson fragmentation functions.

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Sivers and Collins effects in polarized pp scattering processes

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