Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/123479
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Type: Journal article
Title: Measurement of prompt photon production in √sNN = 8.16 TeV p + Pb collisions with ATLAS
Other Titles: Measurement of prompt photon production in root sNN = 8.16 TeV p + Pb collisions with ATLAS
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abbott, D.
Abdinov, O.
Abeloos, B.
Abhayasinghe, D.
Abidi, S.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.
Adachi, S.
Adam, L.
Adamczyk, L.
Adamek, L.
Adelman, J.
Adersberger, M.
et al.
Citation: Physics Letters B, 2019; 796:230-252
Publisher: Elsevier
Issue Date: 2019
ISSN: 0370-2693
1873-2445
Statement of
Responsibility: 
M. Aaboud ... D. Duvnjak .. P. Jackson ... A. Petridis ... A.S. Sharma ... M.J. White ... et al. [The ATLAS Collaboration]
Abstract: The inclusive production rates of isolated, prompt photons in p + Pb collisions at √sNN=8.16TeV are studied with the ATLAS detector at the Large Hadron Collider using a dataset with an integrated luminosity of 165nb⁻¹ recorded in 2016. The cross-section and nuclear modification factor RpPbare measured as a function of photon transverse energy from 20GeV to 550GeV 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.
Rights: ©2019 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP³.
RMID: 0030131175
DOI: 10.1016/j.physletb.2019.07.031
Appears in Collections:Physics publications

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