Single spin asymmetries in lp→hX processes: A test of factorization

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

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Predictions for the transverse single spin asymmetry (SSA), AN, are given for the inclusive processes lp→hX and lp →jet+X, which could be measured in operating or future experiments. These estimates are based on the Sivers distributions and the Collins fragmentation functions which fit the azimuthal asymmetries measured in semi-inclusive deep inelastic scattering (SIDIS) processes (lp →l′hX). The factorization in terms of transverse momentum dependent distribution and fragmentation functions (TMD factorization)-which supplies the theoretical framework in which SIDIS azimuthal asymmetries are analyzed-is assumed to hold also for the lp→hX inclusive process at large PT. A measurement of AN would then provide a direct test of the validity of the TMD factorization in this case and would have important consequences for the study and understanding of SSAs in pp →hX processes.

Original languageEnglish (US)
Article number034007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number3
StatePublished - Feb 4 2010

All Science Journal Classification (ASJC) codes

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


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