publication . Article . Preprint . Other literature type . 2015

Towards a first estimate of the gluon Sivers function from A N data in pp collisions at RHIC

D’Alesio, U.; Murgia, F.; Pisano, C.;
Open Access English
  • Published: 17 Sep 2015
Abstract
Within a generalized parton model approach, with inclusion of spin and intrinsic transverse momentum effects, we show how the latest, highly precise, midrapidity data on the transverse single spin asymmetry measured in $pp\to\pi^0\, X$ by the PHENIX Collaboration at RHIC [1], can be used to get a first estimate on the still poorly known gluon Sivers distribution. To this end we also adopt the present information on the quark Sivers functions, as extracted from semi-inclusive deeply inelastic scattering data. This analysis updates a previous study by some of us where a first bound on this distribution was obtained [2].
Subjects
arXiv: Nuclear Experiment
free text keywords: hep-ph, Nuclear and High Energy Physics, High Energy Physics - Phenomenology, Particle physics, Parton, Transverse plane, Asymmetry, media_common.quotation_subject, media_common, Gluon, Quark, Nuclear physics, Quantum chromodynamics, Inelastic scattering, Physics, Spin-½, Quantum electrodynamics
Funded by
EC| HADRONPHYSICS3
Project
HADRONPHYSICS3
Study of Strongly Interacting Matter
  • Funder: European Commission (EC)
  • Project Code: 283286
  • Funding stream: FP7 | SP4 | INFRA

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