Extracting the Sivers function from polarized semi-inclusive deep inelastic scattering data and making predictions

M. Anselmino, M. Boglione, U. D'Alesio, A. Kotzinian, F. Murgia, Alexey Prokudin

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193 Scopus citations

Abstract

The most recent data on the weighted transverse single spin asymmetry AUTsin(h-S) from HERMES and COMPASS Collaborations are analyzed within the LO parton model with unintegrated parton distribution and fragmentation functions; all transverse motions are taken into account, with exact kinematics, in the elementary interactions. The overall quality of the data is such that, for the first time, a rather well constrained extraction of the Sivers function for u and d quarks is possible and is performed. Comparisons with models are made. Based on the extracted Sivers functions, predictions for AUTsin(h-S) asymmetries at JLab are given; suggestions for further measurements at COMPASS, with a transversely polarized hydrogen target and selecting favorable kinematical ranges, are discussed. Predictions are also presented for single spin asymmetries in Drell-Yan processes at the Relativistic Heavy Ion Collider and the Facility for Antiproton and Ion Research at GSI-Darmstadt.

Original languageEnglish (US)
Article number094007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume72
Issue number9
DOIs
StatePublished - Nov 1 2005

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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