Accessing the gluon GTMD <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>F</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> in exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> production in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>e</mml:mi><mml:mi>p</mml:mi></mml:math> collisions-Reference-Cited by-同舟云学术

Accessing the gluon GTMD F1,4 in exclusive π0 production in ep collisions

Published:2024-05-23 Issue:9 Volume:109 Page:
ISSN:2470-0010
Container-title:Physical Review D
language:en
Short-container-title:Phys. Rev. D

Author:

Bhattacharya Shohini¹^ORCID,Zheng Duxin²^ORCID,Zhou Jian³^ORCID

Affiliation:

1. RIKEN BNL Research Center

2. Shandong Institute of Advanced Technology

3. Shandong University

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) F1,4. Such a longitudinal spin asymmetry that results from the Coulomb-nuclear interference effect, leads to a characteristic azimuthal angular correlation of sin2ϕ, 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

Funder

National Natural Science Foundation of China

National Science Foundation

U.S. Department of Energy

Laboratory Directed Research and Development

Brookhaven Science Associates

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.096029/fulltext