https://doi.org/10.1140/epja/s10050-024-01287-6
Regular Article - Theoretical Physics
Isolated photon production in pp collisions at forward rapidities and high multiplicity events
1
Institute of Physics and Mathematics, Federal University of Pelotas, Postal Code 354, 96010-900, Pelotas, RS, Brazil
2
Faculdade de Ciências Exatas e Tecnologia, Universidade Federal da Grande Dourados (UFGD), Caixa Postal 364, CEP 79804-970, Dourados, MS, Brazil
3
Instituto de Ciência e Tecnologia, Universidade Federal de Alfenas, 37715-400, Poços de Caldas, MG, Brazil
4
Institut für Theoretische Physik, Westfälische Wilhelm-Klemm-Straße 9, 48149, Münster, Germany
Received:
29
November
2023
Accepted:
26
February
2024
Published online:
9
March
2024
The production of isolated photons in high multiplicity events is investigated considering the Color Glass Condensate (CGC) formalism. The associated cross section for proton–proton collisions is estimated considering three distinct solutions of the Balitsky–Kovchegov (BK) equation and predictions for the normalized photon yield as a function of the multiplicities of co-produced charged particles are presented. We predict the increasing of the yield with the multiplicity, with the slope being smaller for larger rapidities. As the isolated photon production is not affected by the fragmentation process, a future experimental investigation of this process in current high energy hadronic colliders is ideal to test the treatment of high multiplicity events using the CGC formalism, previously applied only for the production of hadronic final states.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
