Eur. Phys. J. C (2014) 74: 2910
https://doi.org/10.1140/epjc/s10052-014-2910-7

Regular Article - Theoretical Physics

On the beam spin asymmetries of electroproduction of charged hadrons off the nucleon targets

Department of Physics, Southeast University, Nanjing,  211189, China

^* e-mail: zhunlu@seu.edu.cn

Received: 25 February 2014
Accepted: 15 May 2014
Published online: 3 June 2014

Abstract

We study the beam single-spin asymmetries A_LU^sin φh for charged hadrons produced in semi-inclusive deep-inelastic scattering processes, by considering the eH₁^⊥ term and the g^⊥D₁ term simultaneously. Besides the asymmetries for charged pions, for the first time we present the analysis on the asymmetries in the production of charged kaons, protons, and antiprotons by longitudinally polarized leptons scattered off unpolarized proton and deuteron targets. In our calculation we use two sets of transverse momentum dependent distributions g^⊥(x, k_T²) and e(x, k_T²) calculated from two different spectator models, and we compare the numerical results with the preliminary data recently obtained by the HERMES Collaboration. We also predict the beam spin asymmetries for π^±, K^±, p/p̅^± electroproduction in semi-inclusive deep-inelastic scattering of 12 GeV polarized electrons from unpolarized proton and deuteron targets.