Loading...
Measurement of prompt photon production in √sNN = 8.16 TeV p + Pb collisions with ATLAS
Aaboud, M. Rogan, Christopher The ATLAS Collaboration
Aaboud, M.
Rogan, Christopher
The ATLAS Collaboration
Citations
Altmetric:
Abstract
The inclusive production rates of isolated, prompt photons in p + Pb collisions at √sNN = 8.16 TeV are studied with the ATLAS detector at the Large Hadron Collider using a dataset with an integrated luminosity of 165 nb−1 recorded in 2016. The cross-section and nuclear modification factor RpPb are measured as a function of photon transverse energy from 20 GeV to 550 GeV and in three nucleon–nucleon centre-of-mass pseudorapidity regions, (−2.83,−2.02), (−1.84, 0.91), and (1.09, 1.90). The cross-section and RpPb values are compared with the results of a next-to-leading-order perturbative QCD calculation, with and without nuclear parton distribution function modifications, and with expectations based on a model of the energy loss of partons prior to the hard scattering. The data disfavour a large amount of energy loss and provide new constraints on the parton densities in nuclei.
Description
This work is licensed under a Creative Commons Attribution 4.0 International License.
Date
2019-09-10
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Collections
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
M. Aaboud et al., "Measurement of prompt photon production in sNN=8.16 TeV p + Pb collisions with ATLAS", Physics Letters B, Volume 796, 2019, Pages 230-252, ISSN 0370-2693,
https://doi.org/10.1016/j.physletb.2019.07.031.
(http://www.sciencedirect.com/science/article/pii/S0370269319304885)