arXiv Analytics

Sign in

arXiv:2004.13507 [hep-ph]AbstractReferencesReviewsResources

Single spin asymmetry $A_{UL}^{\sin(2φ_h-2φ_R)}$ in dihadron semi-inclusive DIS

Xuan Luo, Hao Sun

Published 2020-04-27Version 1

The single longitudinal spin asymmetry $A_{UL}^{\sin(2\phi_h-2\phi_R)}$ of dihadron production in semi-inclusive deep inelastic scattering (SIDIS) is examined through helicity-dependent dihadron fragmentation function (DiFF) $G_1^\perp$. The correlation of the longitudinal polarization of a fragmenting quark with the transverse momenta of the produced hadron pair is illustrated by this DiFF. The experimental investigation for this azimuthal asymmetry in dihadron SIDIS by the COMPASS Collaboration has lately yielded a very small signal. Here, the unknown T-odd dihadron fragmentation function $G_1^\perp$ utilizing a spectator model is computed. The model has been successfully used to describe the dihadron production in both the unpolarized and the single polarized processes to access the asymmetry and clarify why the signal is very small. The transverse momentum dependent factorization method, in which the transverse momentum of the final state hadron pair is left unintegrated, has been considered. The $\sin(2\phi_h-2\phi_R)$ asymmetry at the COMPASS kinematics is estimated and we compare it with the data. Besides, the predictions on the same asymmetry are also made at the HERMES and Electron Ion Collider.

Related articles: Most relevant | Search more
arXiv:2003.03770 [hep-ph] (Published 2020-03-08)
Single spin asymmetry $A_{UL}^{\sin(φ_h-φ_R)}$ in dihadron semi-inclusive DIS
arXiv:1104.0798 [hep-ph] (Published 2011-04-05, updated 2011-05-06)
Master Formula for the Three-Gluon Contribution to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
arXiv:1101.2702 [hep-ph] (Published 2011-01-14, updated 2011-01-21)
Single spin asymmetry in $πp$ Drell-Yan process