Speaker
Cristian Pisano
(University and INFN Cagliari (Italy))
Description
Within the so-called color gauge invariant generalized parton model (CGI-GPM), which includes initial (ISI) and final state (FSI) interactions in a transverse momentum dependent formalism, we present a phenomenological analysis of available data on single spin asymmetries for pion and $D$-meson production in $pp$ collisions at RHIC. This allows us, for the first time, to put preliminary constraints on the two universal types of gluon Sivers function entering the model. Predictions for single spin asymmetries in $J/\psi$ and direct photon production, as well as a comparison with the simpler generalized parton model (without ISI and FSI), are also presented.
Authors
Cristian Pisano
(University and INFN Cagliari (Italy))
Umberto D'Alesio
(University of Cagliari)
Carlo Flore
(University and INFN, Cagliari)
Francesco Murgia
(INFN - Sezione di Cagliari)
Dr
Pieter Taels
(INFN - National Institute for Nuclear Physics)
