Speaker
Description
We study the transverse single-spin asymmetry with a sin ϕS modulation in semi-inclusive deep inelastic scattering after the transverse momentum of the final state hadron is integrated out. In particular, we consider the case in which the transverse momentum of the final state hadron is integrated out. Thus, the asymmetry is merely contributed by the coupling of the transversity distribution function h1(x) and the twist-3 collinear fragmentation function H˜ (z). Using the available parametrization of h1(x) from SIDIS data and the recent extracted result for H˜ (z), we predict the sin ϕS asymmetry for charged and neutral pion production at an Electron Ion Collider. We find that the asymmetry is sizable and could be measured. We also include the QCD evolution effect of the transversity h1(x) and the fragmentation function H˜ (z) , which affects the sin ϕS asymmetry at EIC considerably.
