Role of Collins effect in the single spin asymmetry A N in p↑p→h X processes

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

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The much debated issue of the transverse single spin asymmetry A N observed in the inclusive large P T production of a single hadron in pp interactions, p↑p→X, is considered in a transverse momentum dependent factorization scheme. A previous result stating that the maximum contribution of the Collins effect is strongly suppressed, is revisited, correcting a numerical error. New estimates are given, adopting the Collins functions recently extracted from semi-inclusive deep inelastic scattering and e +e - data, and phenomenological consequences are discussed.

Original languageEnglish (US)
Article number074032
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number7
StatePublished - Oct 31 2012

All Science Journal Classification (ASJC) codes

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


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