Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-02
J.Phys.Conf.Ser.295:012064,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 5 figures, to appear in the proceedings of 19th International Spin Physics Symposium (SPIN2010), Sep 27-Oct 2, 2010,
Scientific paper
10.1088/1742-6596/295/1/012064
Using a generalized parton model approach including spin and intrinsic parton motion effects, and assuming the validity of factorization for large p_T jet production in hadronic collisions, we study the azimuthal distribution around the jet axis of leading pions, produced in the jet fragmentation process. We identify the observable leading-twist azimuthal asymmetries for the unpolarized and single-polarized case related to both quark and gluon-originated jets. We account for all physically allowed combinations of the transverse momentum dependent (TMD) parton distribution and fragmentation functions, with special attention to the Sivers, Boer-Mulders, and transversity quark distributions, and to the Collins fragmentation function for quarks (and to the analogous functions for gluon partons).
D'Alesio Umberto
Murgia Francesco
Pisano Cristian
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