Photon-odderon interference in exclusive χc charmonium production at the Electron-Ion Collider

Scientific paper - Original scientific paper

• Author: Sanjin Benić
• Author: Adrian Dumitru
• Author: Abhiram Kaushik
• Author: Leszek Motyka
• Author: Tomasz Stebel
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Exclusive C ¼ þ1 scalar, axial-vector, and tensor quarkonium production in high-energy electronproton scattering requires a C-odd t-channel exchange of a photon or a three-gluon ladder. We derive the expressions for the corresponding amplitudes. The relative phase of the photon vs three-gluon exchange amplitudes is determined by the sign of the light-front matrix element of the eikonal color current operator dabcJþaJþbJþc at moderate x, and is not affected by small-x QCD evolution. Model calculations predict constructive interference, which is particularly strong for momentum transfer jtj ∼ 1 GeV2 where the cross section for χcJ production exceeds that for pure photon exchange by up to a factor of 4. Exclusive χcJ electroproduction at the high luminosity Electron-Ion Collider occurs with well measurable rates and measurements of these processes should find evidence for the perturbative odderon exchange. We also compute the total electroproduction cross section as a function of energy and provide first estimates of the number of χcJ events per month at the Electron-Ion Collider design luminosity.

• Keywords (english): photon-odderon interference; electron-ion collider
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review D
• Numbering: vol. 110, no. 1, 014025
• p-ISSN: 2470-0010
• e-ISSN: 2470-0029
• DOI: https://doi.org/10.1103/PhysRevD.110.014025
• URN:NBN: urn:nbn:hr:217:727863
• Publication: 2024
• Project: Number: UIP-2019-04-5332; Title (croatian): Gluonsko zasićenje u visoko energetskim proton-jezgra sudarima - istraživanje novih fenomenoloških smjernica; Title (english): Gluon saturation in high energy proton-nucleus collisions - exploring new phenomenological directions; Acronym: SAT-PHENO; Leader: Sanjin Benić; Jurisdiction: Croatia; Funding stream: Installation Research Projects
• Document URL: https://link.aps.org/doi/10.1103/PhysRevD.110.014025
• Type of resource: Text
• Access conditions: Open access
• Public note: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 5 March 2024; accepted 10 June 2024; published 19 July 2024.
• Created on: 2024-09-12 12:58:00