Accessing the gluon GTMD F 1 , 4 in exclusive π 0 production in e p collisions

Bhattacharya, Shohini; Zheng, Duxin; Zhou, Jian

doi:10.1103/PhysRevD.109.096029

Accessing the gluon GTMD $F_{1, 4}$ in exclusive $π^{0}$ production in $e p$ collisions

Journal Article · Thu May 23 00:00:00 EDT 2024 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.109.096029· OSTI ID:2361173

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We demonstrate that the longitudinal single target-spin asymmetry in exclusive $π^{0}$ production in $e p$ 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 $\sin 2 ϕ$ , where $ϕ$ is the azimuthal angle between the scattered lepton transverse momentum and the recoil proton’s transverse momentum. We also present a numerical estimate of the asymmetry for the kinematics accessible at EIC and EicC.

Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0012704

OSTI ID:: 2361173

Alternate ID(s):: OSTI ID: 2382656

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 9 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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