Single spin asymmetries in p ↑ →hX processes and transverse momentum dependent factorization

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

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Some estimates for the transverse single spin asymmetry, AN, in the inclusive processes p↑→hX, given in a previous paper, are expanded and compared with new experimental data. The predictions 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 (p↑→′hX). The factorization in terms of transverse momentum dependent distribution and fragmentation functions (TMD factorization) - i.e. the theoretical framework in which SIDIS azimuthal asymmetries are analyzed - is assumed to hold also for the inclusive process p→hX at large PT. The values of AN thus obtained agree in sign and shape with the data. Some predictions are given for future experiments.

Original languageEnglish (US)
Article number114026
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume89
Issue number11
DOIs
StatePublished - Jun 30 2014

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factorization
transverse momentum
asymmetry
momentum
fragmentation
inelastic scattering
predictions
distribution functions
estimates

All Science Journal Classification (ASJC) codes

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

Cite this

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Single spin asymmetries in p ↑ →hX processes and transverse momentum dependent factorization. / Anselmino, M.; Boglione, M.; D'Alesio, U.; Melis, S.; Murgia, F.; Prokudin, Alexey.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 89, No. 11, 114026, 30.06.2014.

Research output: Contribution to journalArticle

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AU - Anselmino, M.

AU - Boglione, M.

AU - D'Alesio, U.

AU - Melis, S.

AU - Murgia, F.

AU - Prokudin, Alexey

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AB - Some estimates for the transverse single spin asymmetry, AN, in the inclusive processes p↑→hX, given in a previous paper, are expanded and compared with new experimental data. The predictions 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 (p↑→′hX). The factorization in terms of transverse momentum dependent distribution and fragmentation functions (TMD factorization) - i.e. the theoretical framework in which SIDIS azimuthal asymmetries are analyzed - is assumed to hold also for the inclusive process p→hX at large PT. The values of AN thus obtained agree in sign and shape with the data. Some predictions are given for future experiments.

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