Speaker
Rajesh Sangem
(INFN Cagliari & University of Cagliari)
Description
We study the Sivers azimuthal asymmetry, and the role of the gluonSivers function (GSF), in inelastic $J/\psi$ leptoproduction, $l\,p^\uparrow\to l^\prime+J/\psi+ X$ within a phenomenological TMD scheme, known as the generalized parton model (GPM). We adopt the NRQCD effective theory for the quarkonium formation mechanism and employ the colour-gauge invariant version of the GPM to study the effects of final-state interactions on the GSF. We compare our results for the unpolarized cross sections against H1 and ZEUS data, and the maximized Sivers asymmetry with the available data point from the COMPASS Collaboration. We also present estimates for the maximized Sivers asymmetry at the EIC.
Authors
Umberto D'Alesio
(University of Cagliari)
Asmita Mukherjee
(IIT Bombay)
Francesco Murgia
(INFN - Sezione di Cagliari)
Cristian Pisano
(University and INFN Cagliari (Italy))
Rajesh Sangem
(INFN Cagliari & University of Cagliari)
