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

Agni Bethani; Brian Cox; Jonathan Crane; Cinzia Da Via; Nicholas Dann; Alessandra Forti; David Lack; Frederick Loebinger; Jiri Masik; Stephen Menary; Francisca Munoz Sanchez; Alexander Oh; Emily Orgill; Joleen Pater; Yvonne Peters; Andrew Pilkington; Darren Price; Yang Qin; Jacob Rawling; Nicolas Scharmberg; Savanna Shaw; Stephen Watts; Terence Wyatt; The ATLAS Collaboration

doi:10.1016/j.physletb.2019.07.031

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

Agni Bethani, Brian Cox, Jonathan Crane, Cinzia Da Via, Nicholas Dann, Alessandra Forti, David Lack, Frederick Loebinger, Jiri Masik, Stephen Menary, Francisca Munoz Sanchez, Alexander Oh, Emily Orgill, Joleen Pater, Yvonne Peters, Andrew Pilkington, Darren Price, Yang Qin, Jacob Rawling, Nicolas ScharmbergSavanna Shaw, Stephen Watts, Terence Wyatt, The ATLAS Collaboration

Department of Physics & Astronomy

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

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.

Original language	English
Pages (from-to)	96-116
Number of pages	20
Journal	Physics Letters B
Volume	788
Early online date	17 Jul 2019
DOIs	https://doi.org/10.1016/j.physletb.2019.07.031
Publication status	Published - 10 Sept 2019

Keywords

Double Drell–Yan
Double parton-scattering
Four-lepton production
Higgs golden decay channel

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Bethani, A., Cox, B., Crane, J., Da Via, C., Dann, N., Forti, A., Lack, D., Loebinger, F., Masik, J., Menary, S., Munoz Sanchez, F., Oh, A., Orgill, E., Pater, J., Peters, Y., Pilkington, A., Price, D., Qin, Y., Rawling, J., ... The ATLAS Collaboration (2019). Measurement of prompt photon production in √SNN = 8.16 TeV p + Pb collisions with ATLAS. Physics Letters B, 788, 96-116. https://doi.org/10.1016/j.physletb.2019.07.031

@article{2bd2896b398c416f8ac1300e54907a9d,

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 = "Double Drell–Yan, Double parton-scattering, Four-lepton production, Higgs golden decay channel",

author = "Agni Bethani and Brian Cox and Jonathan Crane and {Da Via}, Cinzia and Nicholas Dann and Alessandra Forti and David Lack and Frederick Loebinger and Jiri Masik and Stephen Menary and {Munoz Sanchez}, Francisca and Alexander Oh and Emily Orgill and Joleen Pater and Yvonne Peters and Andrew Pilkington and Darren Price and Yang Qin and Jacob Rawling and Nicolas Scharmberg and Savanna Shaw and Stephen Watts and Terence Wyatt and {The ATLAS Collaboration}",

year = "2019",

month = sep,

day = "10",

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

language = "English",

volume = "788",

pages = "96--116",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier BV",

}

Bethani, A, Cox, B, Crane, J, Da Via, C, Dann, N, Forti, A, Lack, D, Loebinger, F, Masik, J, Menary, S, Munoz Sanchez, F , Oh, A, Orgill, E, Pater, J, Peters, Y , Pilkington, A , Price, D, Qin, Y, Rawling, J, Scharmberg, N, Shaw, S, Watts, S, Wyatt, T & The ATLAS Collaboration 2019, 'Measurement of prompt photon production in √SNN = 8.16 TeV p + Pb collisions with ATLAS', Physics Letters B, vol. 788, pp. 96-116. https://doi.org/10.1016/j.physletb.2019.07.031

TY - JOUR

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

AU - Bethani, Agni

AU - Cox, Brian

AU - Crane, Jonathan

AU - Da Via, Cinzia

AU - Dann, Nicholas

AU - Forti, Alessandra

AU - Lack, David

AU - Loebinger, Frederick

AU - Masik, Jiri

AU - Menary, Stephen

AU - Munoz Sanchez, Francisca

AU - Oh, Alexander

AU - Orgill, Emily

AU - Pater, Joleen

AU - Peters, Yvonne

AU - Pilkington, Andrew

AU - Price, Darren

AU - Qin, Yang

AU - Rawling, Jacob

AU - Scharmberg, Nicolas

AU - Shaw, Savanna

AU - Watts, Stephen

AU - Wyatt, Terence

AU - The ATLAS Collaboration,

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 - Double Drell–Yan

KW - Double parton-scattering

KW - Four-lepton production

KW - Higgs golden decay channel

U2 - 10.1016/j.physletb.2019.07.031

DO - 10.1016/j.physletb.2019.07.031

M3 - Article

SN - 0370-2693

VL - 788

SP - 96

EP - 116

JO - Physics Letters B

JF - Physics Letters B

ER -

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

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Keywords

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