Sivers and Collins Effects: from SIDIS to Proton-Proton Inclusive Pion Production

Details Sivers and Collins Effects: from SIDIS to Proton-Proton Inclusive Pion Production Sivers and Collins Effects: from SIDIS to Proton-Proton Inclusive Pion Production

2009-07-23

arxiv.org/abs/0907.3999v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk by M. Boglione at the "XVII International Workshop on Deep-Inelastic Scattering and Related subjects", DIS 2009, 26-30 Ap

Scientific paper

We consider the Sivers, Collins and transversity functions as extracted from SIDIS and e+e- experimental data and investigate to what extent they might explain the large Single Spin Asymmetries (SSA) observed in proton-proton inclusive processes. This phenomenological study is performed within the TMD factorization scheme. As the SIDIS data cover only a limited range of x values (x < 0.3), we allow for different large $x$ behaviours of the SIDIS Sivers functions and transversity distributions. We conclude that, within the available experimental constraints, one cannot observe any clear universality breaking effect for the Sivers functions.

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