Measurement of prompt photon production in √sNN=8.16 TeV p+Pb collisions with ATLAS

ATLAS Collaboration

doi:10.1016/j.physletb.2019.07.031

Measurement of prompt photon production in √s_NN=8.16 TeV p+Pb collisions with ATLAS

ATLAS Collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

142 Downloads (Pure)

Abstract

The inclusive production rates of isolated, prompt photons in p+Pb collisions at √s_NN=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 R_pPb 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 R_pPb 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.

Original language	English
Pages (from-to)	230-252
Number of pages	23
Journal	Physics Letters B
Volume	796
Early online date	17 Jul 2019
DOIs	https://doi.org/10.1016/j.physletb.2019.07.031
Publication status	Published - 10 Sept 2019

Keywords

nucl-ex
hep-ex

Access to Document

10.1016/j.physletb.2019.07.031Licence: Creative Commons: Attribution (CC BY)

The_ATLAS_Collaboration_Measurement_of_prompt_photon_production_Physics_Letters_B_2019
The ATLAS Collaboration, 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, © 2019 The Authors. Published by Elsevier B.V. https://doi.org/10.1016/j.physletb.2019.07.031
Final published version, 2.25 MBLicence: Creative Commons: Attribution (CC BY)

https://www.sciencedirect.com/science/article/pii/S0370269319304885Licence: Creative Commons: Attribution (CC BY)

Cite this

@article{b1e7346b1f9d4254957cf6f8282e45b4,

title = "Measurement of prompt photon production in √sNN=8.16 TeV p+Pb collisions with ATLAS",

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.",

keywords = "nucl-ex, hep-ex",

author = "{ATLAS Collaboration} and Paul Newman",

year = "2019",

month = sep,

day = "10",

doi = "10.1016/j.physletb.2019.07.031",

language = "English",

volume = "796",

pages = "230--252",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Measurement of prompt photon production in √sNN=8.16 TeV p+Pb collisions with ATLAS

AU - ATLAS Collaboration

AU - Newman, Paul

PY - 2019/9/10

Y1 - 2019/9/10

N2 - 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.

AB - 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.

KW - nucl-ex

KW - hep-ex

UR - http://www.scopus.com/inward/record.url?scp=85069881218&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2019.07.031

DO - 10.1016/j.physletb.2019.07.031

M3 - Article

SN - 0370-2693

VL - 796

SP - 230

EP - 252

JO - Physics Letters B

JF - Physics Letters B

ER -