New insight on the Sivers transverse momentum dependent distribution function
Abstract
Polarised Semi-Inclusive Deep Inelastic Scattering (SIDIS) processes allow to study Transverse Momentum Dependent partonic distributions (TMDs), which reveal a non trivial three dimensional internal structure of the hadrons in momentum space. One of the most representative of the TMDs is the so-called Sivers function that describes the distribution of unpolarized quarks inside a transversely polarized proton. We present a novel extraction of the Sivers distribution functions from the most recent experimental data of HERMES and COMPASS experiments. Using suitable parametrizations, within the TMD factorization scheme, and a simple fitting strategy, we also perform a preliminary exploration of the role of the proton sea quarks.
Keywords
Cite
@article{arxiv.1012.3565,
title = {New insight on the Sivers transverse momentum dependent distribution function},
author = {M. Anselmino and M. Boglione and U. D'Alesio and S. Melis and F. Murgia and A. Prokudin},
journal= {arXiv preprint arXiv:1012.3565},
year = {2015}
}
Comments
Talk delivered by M. Boglione at SPIN2010, September 27-October 2, 2010, Juelich, Germany. Left panel of Fig. 5 replaced