Collins and sivers effects in p↑p → jet πX: Universality and process dependence

Journal Article · Tue Jul 15 00:00:00 EDT 2014 · Physics of Particles and Nuclei

DOI:https://doi.org/10.1134/S1063779614040054· OSTI ID:22977313

D’Alesio, U., E-mail: [e-mail] ^[1]; Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, Monserrato ^[2]; Murgia, F., E-mail: [e-mail] ^[3]; Pisano, C., E-mail: [e-mail] ^[1]; Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, Monserrato ^[2]; Nikhef and Department of Physics and Astronomy, VU University Amsterdam, Amsterdam ^[4]

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1. Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, Monserrato (Italy)
2. (Italy)
3. Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, Monserrato (Italy)
4. (Netherlands)

In this paper we briefly review the transverse momentum dependent generalized parton model and its application to the study of azimuthal asymmetries in the distribution of leading hadrons (mainly pions) inside large transverse momentum jets inclusively produced in polarized proton-proton collisions. We put particular emphasis on the phenomenological interest of these observables, in combination with similar asymmetries measured in semi-inclusive deeply inelastic scattering, Drell-Yan processes and e{sup +} e{sup −} collisions, for the study of the universality properties of the transverse momentum dependent parton distribution and fragmentation functions. We present results for RHIC kinematics at center-of-mass energies √s = 200 and 500 GeV, for central and mainly forward jet rapidities, in particular for the Sivers distribution and the Collins fragmentation function, that are believed to be responsible for many of the largest asymmetries measured in the last years. We also briefly discuss the case of inclusive jet production and recent phenomenological applications of other theoretical approaches, like the colour gauge invariant generalized parton model and the collinear twist-three approach, aiming at clarifying the issues of the universality and process dependence of transverse momentum dependent functions.

• OSTI ID: 22977313
• Journal Information: Physics of Particles and Nuclei, Vol. 45, Issue 4; Other Information: Copyright (c) 2014 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7796
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BROOKHAVEN RHIC
CENTER-OF-MASS SYSTEM
DEEP INELASTIC SCATTERING
DISTRIBUTION
DRELL MODEL
GAUGE INVARIANCE
GLUON MODEL
JET MODEL
PARTICLE RAPIDITY
PROTON-PROTON INTERACTIONS
QUARK MODEL
TRANSVERSE MOMENTUM