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arXiv · 1012.0440

Azimuthal asymmetries for hadron distributions inside jets in hadronic collisions

Umberto D'Alesio·Francesco Murgia·Cristian Pisano
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Abstract

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).

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Umberto D'Alesio, Francesco Murgia, Cristian Pisano. 2010-12-02. Azimuthal asymmetries for hadron distributions inside jets in hadronic collisions. https://doi.org/10.1088/1742-6596%2F295%2F1%2F012064

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