Single spin asymmetries in l p --> h + X processes

2); 2) ((1) University of Torino; (2) INFN; (3) University of Cagliari; 4); (4) INFN; 5); (5) University of Piemonte Orientale; A. Prokudin (1; Cagliari

arxiv: 0907.3829 · v1 · submitted 2009-07-22 · ✦ hep-ph

Single spin asymmetries in l p --> h + X processes

M. Anselmino (1 , 2) , M. Boglione (1 , U. D'Alesio (3 , 4) , S. Melis (2 , 5) , F. Murgia (4)

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A. Prokudin (1 2) ((1) University of Torino Italy (2) INFN Torino (3) University of Cagliari (4) INFN Cagliari (5) University of Piemonte Orientale Italy)

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classification ✦ hep-ph

keywords singlespinfactorizationprocesstransverseadoptingasymmetriesasymmetry

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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.

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Single spin asymmetries in l p --> h + X processes

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