New insight on the Sivers transverse momentum dependent distribution function

M. Anselmino, M. Boglione, U. D'Alesio, S. Melis, F. Murgia, A. Prokudin

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Abstract

Polarised Semi-Inclusive Deep Inelastic Scattering (SIDIS) processes, ℓ(S)p(S) → ℓ h X 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.

Original languageEnglish (US)
Article number012062
JournalJournal of Physics: Conference Series
Volume295
Issue number1
DOIs
StatePublished - Jan 1 2011

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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