Double-spin asymmetry $A_{LT}^{\cos {\varphi }_S}$ in semi-inclusive DIS at CLAS12 and EIC within the collinear framework

Abstract

We study the longitudinal-transverse double-spin asymmetry with a $\cos {\varphi }_S$ modulation in semi-inclusive deep inelastic scattering for charged and neutral pions 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 $g_T(x)$ and the unpolarized fragmentation function $D_1(z)$, the other is related to the coupling of the transversity distribution function $h_1(x)$ and the collinear twist-3 fragmentation function $\tilde{E}(z)$. We take into account both contributions to predict the $\cos {\varphi }_S$ 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 $\tilde{E}(z)$ can play an important role in the asymmetry in the large-$z$ region.

9 pages, 5 figures, match the version published in PRD

References in corpus (7)

• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• Azimuthal spin asymmetries in light-cone constituent quark models
• Predictions for double spin asymmetry A_{LT} in Semi Inclusive DIS
• Higher twist parton distributions from light-cone wave functions
• Proposal for measuring new transverse momentum dependent parton distributions $g_{1T}$ and $h_{1L}^{\perp }$ through semi-inclusive deep inelastic scattering
• Predictions for Sivers single spin asymmetries in one- and two-hadron electroproduction at CLAS12 and EIC
• Double Spin Asymmetries $A_{LT}^{\cos {\varphi }_S}$ and $A_{LT}^{\cos (2{\varphi }_h-{\varphi }_S)}$ in semi-inclusive DIS

Cited by in corpus (3)

• Semi-Inclusive Deep Inelastic Scattering in Wandzura-Wilczek-type approximation
• Transverse structure of the proton beyond leading twist: A light-front Hamiltonian approach
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects