Azimuthal asymmetries in p p → jet π X

Pisano, Cristian;D'Alesio, Umberto;Murgia, Francesco

2015-01-01

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Abstract

We study the azimuthal asymmetries for the distributions of leading pions inside a jet produced inclusively in high-energy proton-proton collisions within the framework of the transverse momentum dependent generalized parton model. We present results for the RHIC center-of-mass energies √s = 200 and 500 GeV, mainly for forward jet rapidities, in particular for the two mechanisms which dominate such asymmetries: the Sivers and the Collins effects. We also briefly discuss the case of inclusive jet production and, adopting the socalled colour gauge invariant parton model, we propose a phenomenological analysis of the process dependence of the quark Sivers function.