Isolated photon-hadron production in high energy pp and pA collisions at RHIC and LHC

Scientific paper - Original scientific paper

• Author: Sanjin Benić
• Author: Oscar Garcia-Montero
• Author: Anton Perkov
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We compute the isolated photon production in association with a charged hadron at midrapidity in pp and pA based on the Color Glass Condensate (CGC) framework of high energy Quantum Chromodynamics (QCD) where, for the first time, we incorporate the Sudakov effect of soft gluon emissions. Our results are based on the leading order qg → qγ channel in the CGC framework and confronted with the recent data from Relativistic Heavy-Ion Collider (RHIC) and Large Hadron Collider (LHC) concerning the angular distributions and out-of-plane transverse momentum distributions. We find that, while the CGC computation alone results in too narrow distributions, with the help of the Sudakov effect, we can get a satisfactory description of the data. With this as a benchmark, we provide predictions for the magnitude of the nuclear effect brought by the phenomena of gluon saturation in the CGC.

• Keywords (english): Color Glass Condensate; Sudakov resummation; photon-hadron production
• 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. 105, no. 11, 114052
• p-ISSN: 2470-0010
• e-ISSN: 2470-0029
• DOI: https://doi.org/10.1103/PhysRevD.105.114052
• URN:NBN: urn:nbn:hr:217:693173
• Publication: 2022
• 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.105.114052
• 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 10 March 2022; accepted 6 June 2022; published 29 June 2022.
• Created on: 2024-08-31 17:58:05