Abstract
A distorted spin-dependent spectral function for 3He is considered to take care of the final state interaction in the extraction of the quark transverse-momentum distributions in the neutron from semi-inclusive deep inelastic electron scattering off polarized 3He at finite momentum transfers. The generalization of the analysis in a Poincaré covariant framework within the light-front dynamics is outlined. The definition of the light-front spin-dependent spectral function for a J=1/2 system, as the nucleon, allows us to show that within the light-front dynamics and in the valence approximation only three of the six leading twist T-even transverse-momentum distributions are independent.
Highlights
Information on the quark orbital angular momentum, Lq, of the proton can be obtained from the quark transverse momentum distributions (TMDs) [1], that can be accessed through non forward processes, as semi-inclusive deep inelastic electron scattering (SiDIS)
A realistic study of the DIS processes off 3He and in particular of the single spin asymmetries (SSAs) in the reaction 3He(e, e′π±)X beyond the plane wave impulse approximation (PWIA) and the non relativistic approach is under way
The relativistic effects are studied through the analysis of a LF spectral function
Summary
Information on the quark orbital angular momentum, Lq, of the proton can be obtained from the quark transverse momentum distributions (TMDs) [1], that can be accessed through non forward processes, as semi-inclusive deep inelastic electron scattering (SiDIS). D(e, e′π)x [6], showing a strong flavor dependence of TMDs. D(e, e′π)x [6], showing a strong flavor dependence of TMDs This puzzle has attracted a great interest in obtaining new information on the neutron TMDs. To clarify the flavour dependence of the quark transverse momentum distributions, high precision experiments involving both protons and neutrons are needed [7]. [8] the possibility to extract information on the neutron TMDs from experimental measurements of the SSAs on 3He was proposed. Between the observed pion and the remnant debris, and iii) the relativistic effects
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