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Isolated photon production and pion-photon correlations in high-energy pp and pA collisions

Goncalves, Victor P. LU ; Lima, Yuri ; Pasechnik, Roman LU and Šumbera, Michal (2020) In Physical Review D 101(9).
Abstract

A phenomenological study of the isolated photon production in high energy pp and pA collisions at RHIC and LHC energies is performed. Using the color dipole approach we investigate the production cross section differential in the transverse momentum of the photon considering three different phenomenological models for the universal dipole cross section. We also present the predictions for the rapidity dependence of the ratio of pA to pp cross sections. As a further test of the formalism, for different energies and photon rapidities we analyze the correlation function in azimuthal angle Δφ between the photon and a forward pion. The characteristic double-peak structure of the correlation function around Δφ≃π observed previously for... (More)

A phenomenological study of the isolated photon production in high energy pp and pA collisions at RHIC and LHC energies is performed. Using the color dipole approach we investigate the production cross section differential in the transverse momentum of the photon considering three different phenomenological models for the universal dipole cross section. We also present the predictions for the rapidity dependence of the ratio of pA to pp cross sections. As a further test of the formalism, for different energies and photon rapidities we analyze the correlation function in azimuthal angle Δφ between the photon and a forward pion. The characteristic double-peak structure of the correlation function around Δφ≃π observed previously for Drell-Yan pair production is found for an isolated photon emitted into the forward rapidity region which can be tested by future experiments.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
101
issue
9
article number
094019
publisher
American Physical Society
external identifiers
  • scopus:85090997029
ISSN
2470-0010
DOI
10.1103/PhysRevD.101.094019
language
English
LU publication?
yes
id
2bc0aa8c-463c-46b5-a1be-c8171f877d11
date added to LUP
2020-10-06 14:25:22
date last changed
2024-04-03 14:33:43
@article{2bc0aa8c-463c-46b5-a1be-c8171f877d11,
  abstract     = {{<p>A phenomenological study of the isolated photon production in high energy pp and pA collisions at RHIC and LHC energies is performed. Using the color dipole approach we investigate the production cross section differential in the transverse momentum of the photon considering three different phenomenological models for the universal dipole cross section. We also present the predictions for the rapidity dependence of the ratio of pA to pp cross sections. As a further test of the formalism, for different energies and photon rapidities we analyze the correlation function in azimuthal angle Δφ between the photon and a forward pion. The characteristic double-peak structure of the correlation function around Δφ≃π observed previously for Drell-Yan pair production is found for an isolated photon emitted into the forward rapidity region which can be tested by future experiments.</p>}},
  author       = {{Goncalves, Victor P. and Lima, Yuri and Pasechnik, Roman and Šumbera, Michal}},
  issn         = {{2470-0010}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{9}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D}},
  title        = {{Isolated photon production and pion-photon correlations in high-energy pp and pA collisions}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.101.094019}},
  doi          = {{10.1103/PhysRevD.101.094019}},
  volume       = {{101}},
  year         = {{2020}},
}