Accessing the gluon GTMD \boldsymbolF_1,4 in exclusive \boldsymbolπ⁰ production in \boldsymbolep collisions

2023/04/12 by Bhattacharya, Shohini, Zheng, Duxin, Zhou, Jian
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2304.05784

Abstract

We demonstrate that the longitudinal single target-spin asymmetry in exclusive π⁰ production in ep collisions can give access to the imaginary part of the gluon generalized transverse momentum distribution (GTMD) F_1,4. Such a longitudinal spin asymmetry that results from the Coulomb-nuclear interference effect, leads to a characteristic azimuthal angular correlation of sin 2ϕ, where ϕ is the azimuthal angle between the scattered lepton transverse momentum and the recoiled proton's transverse momentum. We also present a numerical estimate of the asymmetry for the kinematics accessible at EIC and EicC.

Related

• Unraveling Gluon TMDs in J/ψ and Pion production at the EIC
• Twist-3 quark-gluon correlation contribution to single-transverse spin asymmetry for direct-photon and single-jet productions in pp collision
• Gluon TMDs from J/ψ production in longitudinally polarized deeply inelastic scattering
• Transverse single-spin asymmetries in γSIDIS as a direct probe of quark-gluon-quark longitudinal momentum structure
• The sin(2ϕ) azimuthal asymmetry in exclusive π⁰ production