New insight on the Sivers transverse momentum dependent distribution function
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1015452
- Report Number(s):
- JLAB-THY-10-1298; DOE/OR/23177-1462; arXiv:1012.3565; TRN: US1102850
- Journal Information:
- J.Phys.Conf.Ser., Vol. 295, Issue 1; Conference: SPIN 2010, Juelich, Germany, 27 Sep - 2 Oct 2010.
- Country of Publication:
- United States
- Language:
- English
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