publication . Article . Preprint . 2012

Strategy towards the extraction of the Sivers function with transverse momentum dependent evolution

M. Anselmino; Mariaelena Boglione; Stefano Melis;
Open Access English
  • Published: 01 Jan 2012
  • Country: Italy
Abstract
The QCD evolution of the unpolarized Transverse Momentum Dependent (TMD) distribution functions and of the Sivers functions have been discussed in recent papers. Following such results we reconsider previous extractions of the Sivers functions from semi-inclusive deep inelastic scattering data and propose a simple strategy which allows to take into account the Q^2 dependence of the TMDs in comparison with experimental findings. A clear evidence of the phenomenological success of the TMD evolution equations is given, mostly, by the newest COMPASS data off a transversely polarized proton target.
Subjects
free text keywords: Nuclear and High Energy Physics, High Energy Physics - Phenomenology, Particle physics, Quantum chromodynamics, Compass, Deep inelastic scattering, Proton, Transverse momentum, Distribution function, Parametrization, Physics, Nuclear physics
Funded by
EC| HADRONPHYSICS3
Project
HADRONPHYSICS3
Study of Strongly Interacting Matter
  • Funder: European Commission (EC)
  • Project Code: 283286
  • Funding stream: FP7 | SP4 | INFRA
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