Abstract
We study the longitudinal-transverse double-spin asymmetry with a modulation in semi-inclusive deep inelastic scattering for charged and neutral pion production. We consider the particular case in which the transverse momentum of the final-state hadron is integrated out. The corresponding asymmetry may be contributed by two parts: one is the convolution of the twist-3 distribution function and the unpolarized fragmentation function ; the other is related to the coupling of the transversity distribution function and the collinear twist-3 fragmentation function . We take into account both contributions to predict the asymmetry at the kinematics of CLAS12 and a future Electron Ion Collider. We find that the asymmetry of pion production at CLAS12 is sizable, and can play an important role in the asymmetry in the large- region.
- Received 7 June 2016
DOI:https://doi.org/10.1103/PhysRevD.94.074014
© 2016 American Physical Society