arXiv:0907.3829·v1·High Energy Physics — Phenomenology
Single spin asymmetries in l p --> h + X processes
M. Anselmino (1,2)🇮🇹 · M. Boglione (1,2)🇮🇹 · U. D'Alesio (3,4)🇮🇹 · S. Melis (2,5)🇮🇹 · F. Murgia (4)🇮🇹 · A. Prokudin (1,2) ((1) University of Torino, Italy, (2) INFN, Torino, Italy, (3) University of Cagliari, Italy, (4) INFN, Cagliari, Italy, (5) University of Piemonte Orientale, Italy)🇮🇹
Abstract
We study the transverse single spin asymmetry (SSA), A_N, for the single inclusive process l p (transv. polarized) --> h + X, in a perturbative QCD factorization scheme with inclusion of spin and transverse momentum dependent (TMD) distributions. By adopting the relevant TMDs (Sivers and Collins functions) as extracted from semi-inclusive deep inelastic scattering (SIDIS) and e+e- data, predictions for these SSAs are given. A measurement of A_N for this process could then provide a direct test of the validity of the TMD factorization.
Comments: 5 pages, 7 ps figures, uses dis09.cls. Talk delivered by U. D'Alesio at the "XVII International Workshop on Deep-Inelastic Scattering and Related Subjects" DIS 2009, 26-30 April 2009, Madrid, Spain