Regular Article - Theoretical Physics
Single transverse spin asymmetries in semi-inclusive deep inelastic scattering in a spin-1 diquark model
Department of Physics, Dr. B. R. Ambedkar National Institute of Technology, 144011, Jalandhar, India
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Accepted: 14 April 2015
Published online: 30 April 2015
The observed results for the azimuthal single spin asymmetries (SSAs) of the proton, measured in the semi-inclusive deep inelastic scattering (SIDIS), can be explained by the final-state interaction (FSI) from the gluon exchange between the outgoing quark and the target spectator system. SSAs require a phase difference between two amplitudes coupling the target with opposite spins to the same final state. We have used the model of light front wave functions (LFWFs) consisting of a spin- system as a composite of a spin- fermion and a spin-1 vector boson to estimate the SSAs. The implications of such a model have been investigated in detail by considering different coupling constants. The FSIs also produce a complex phase which can be included in the LFWFs to calculate the Sivers and Boer-Mulders distribution functions of the nucleon.
© SIF, Springer-Verlag Berlin Heidelberg, 2015