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)
TL;DR
This paper predicts the transverse single spin asymmetry in lepton-proton collisions using TMD distributions, providing a test for TMD factorization in perturbative QCD.
Contribution
It offers the first predictions of SSAs in l p → h + X processes using TMDs from SIDIS and e+e- data, testing TMD factorization validity.
Findings
Predicted SSAs based on extracted TMDs.
Proposed experimental test for TMD factorization.
Connects SIDIS and e+e- data to SSA predictions.
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.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research