Quark helicity distributions in transverse momentum space and transverse coordinate space
Quark helicity distributions in transverse momentum space and transverse coordinate space
The transverse momentum dependent helicity distributions of valence quarks are calculated in the light-cone diquark model by adopting two different approaches. We use the model results to analyze the ${P}_{h\ensuremath{\perp}}$-dependent double spin asymmetries for ${\ensuremath{\pi}}^{+}$, ${\ensuremath{\pi}}^{\ensuremath{-}}$, and ${\ensuremath{\pi}}^{0}$ productions in semi-inclusive deep inelastic scattering, and find that the asymmetries agree …