Single-transverse-spin asymmetries: From deep inelastic scattering to hadronic collisions

Werner Vogelsang and Feng Yuan

Phys. Rev. D 72, 054028 – Published 30 September 2005

Abstract

We study single-spin asymmetries in semi-inclusive deep inelastic scattering with transversely polarized target. Based on the QCD factorization approach, we consider Sivers and Collins contributions to the asymmetries. We fit simple parametrizations for the Sivers and Collins functions to the recent HERMES data, and compare to results from COMPASS. Using the fitted parametrizations for the Sivers functions, we predict the single-transverse-spin asymmetries for various processes in $p p$ collisions at the Relativistic Heavy Ion Collider, including the Drell-Yan process and angular correlations in dijet and jet-plus-photon production. These asymmetries are found to be sizable at forward rapidities.

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Received 27 July 2005

DOI:https://doi.org/10.1103/PhysRevD.72.054028

Authors & Affiliations

Werner Vogelsang^1,2,* and Feng Yuan^2,†

¹Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
²RIKEN BNL Research Center, Building 510A, Brookhaven National Laboratory, Upton, New York 11973, USA

^*Electronic address: vogelsan@quark.phy.bnl.gov
^†Electronic address: fyuan@quark.phy.bnl.gov

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Issue

Vol. 72, Iss. 5 — 1 September 2005

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Physical Review D

covering particles, fields, gravitation, and cosmology