Signature of the Gluon Orbital Angular Momentum

Bhattacharya, Shohini; Boussarie, Renaud; Hatta, Yoshitaka

doi:10.1103/physrevlett.128.182002

Title: Signature of the Gluon Orbital Angular Momentum

Journal Article · 02 May 2022 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.128.182002 · OSTI ID:1866010

^[1]; Boussarie, Renaud ^[2];

^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Ecole Polytechnique, Palaiseau (France). Inst. Polytechnique de Paris
Brookhaven National Lab. (BNL), Upton, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center

We propose a novel observable for the experimental detection of the gluon orbital angular momentum (OAM) that constitutes the proton spin sum rule. We consider longitudinal double spin asymmetry in exclusive dijet production in electron-proton scattering and demonstrate that the cos φ azimuthal angle correlation between the scattered electron and proton is a sensitive probe of the gluon OAM at small-x and its interplay with the gluon helicity. We also present a numerical estimate of the cross section for the kinematics of the Electron-Ion Collider.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Grant/Contract Number:: SC0012704

OSTI ID:: 1866010

Alternate ID(s):: OSTI ID: 1867195

Report Number(s):: BNL-222979-2022-JAAM; TRN: US2306153

Journal Information:: Physical Review Letters, Vol. 128, Issue 18; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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