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, and A. Prokudin

Phys. Rev. D 72, 094007 – Published 10 November 2005; Erratum Phys. Rev. D 72, 099903 (2005)

Abstract

The most recent data on the weighted transverse single spin asymmetry $A_{U T}^{\sin (ϕ_{h} - ϕ_{S})}$ 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 $A_{U T}^{\sin (ϕ_{h} - ϕ_{S})}$ 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.

Received 19 July 2005
Corrected 14 November 2005

DOI:https://doi.org/10.1103/PhysRevD.72.094007

Corrections

14 November 2005

Erratum

Publisher’s Note: Extracting the Sivers function from polarized semi-inclusive deep inelastic scattering data and making predictions [Phys. Rev. D 72, 094007 (2005)]

M. Anselmino, M. Boglione, U. D’Alesio, A. Kotzinian, F. Murgia, and A. Prokudin

Phys. Rev. D 72, 099903 (2005)

Authors & Affiliations

M. Anselmino¹, M. Boglione¹, U. D’Alesio², A. Kotzinian³, F. Murgia², and A. Prokudin¹

¹Dipartimento di Fisica Teorica, Università di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino, Italy
²INFN, Sezione di Cagliari and Dipartimento di Fisica, Università di Cagliari, C.P. 170, I-09042 Monserrato (Cagliari), Italy
³Dipartimento di Fisica Generale, Università di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino, Italy

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Issue

Vol. 72, Iss. 9 — 1 November 2005

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