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Probing the Quark Orbital Angular Momentum at Electron-Ion Colliders Using Exclusive π0 Production

Shohini Bhattacharya1, Duxin Zheng2, and Jian Zhou3

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Phys. Rev. Lett. 133, 051901 – Published 31 July, 2024

DOI: https://doi.org/10.1103/PhysRevLett.133.051901

Abstract

We propose to detect signals from quark orbital angular momentum (OAM) through exclusive π0 production in electron- (longitudinally polarized) proton collisions. Our analysis demonstrates that the sin2ϕ azimuthal angular correlation between the transverse momentum of the scattered electron and the recoil proton serves as a sensitive probe of quark OAM. Additionally, we present a numerical estimate of the asymmetry associated with this correlation for the kinematics accessible at the Electron-Ion Colliders in the U.S. and China. This study aims to pave the way for the first experimental study of quark OAM in relation to the Jaffe-Manohar spin sum rule.

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Corrections

2 August, 2024

Correction: A typographical error in an operator in the first line of Eq. (7) has been set right.

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Supplemental Material

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Outline

Information

Phys. Rev. Lett. 133, 051901– Published 31 July, 2024
  • Received 14 January 2024
  • Revised 24 May 2024
  • Accepted 25 June 2024
  • Corrected 2 August 2024
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