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

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dc.contributor.authorAaboud, M.
dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, D.C.
dc.contributor.authorAbdinov, O.
dc.contributor.authorAbeloos, B.
dc.contributor.authorAbhayasinghe, D.K.
dc.contributor.authorAbidi, S.H.
dc.contributor.authorAbouZeid, O.S.
dc.contributor.authorAbraham, N.L.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbulaiti, Y.
dc.contributor.authorAcharya, B.S.
dc.contributor.authorAdachi, S.
dc.contributor.authorAdam, L.
dc.contributor.authorAdamczyk, L.
dc.contributor.authorAdamek, L.
dc.contributor.authorAdelman, J.
dc.contributor.authorAdersberger, M.
dc.contributor.authoret al.
dc.date.issued2019
dc.description.abstractThe 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.
dc.description.statementofresponsibilityM. Aaboud ... D. Duvnjak .. P. Jackson ... A. Petridis ... A.S. Sharma ... M.J. White ... et al. [The ATLAS Collaboration]
dc.identifier.citationPhysics Letters B, 2019; 796:230-252
dc.identifier.doi10.1016/j.physletb.2019.07.031
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.orcidJackson, P. [0000-0002-0847-402X]
dc.identifier.orcidOliver, J.L. [0000-0002-0713-6627]
dc.identifier.orcidWhite, M. [0000-0001-5474-4580]
dc.identifier.urihttp://hdl.handle.net/2440/123479
dc.language.isoen
dc.publisherElsevier
dc.relation.grantARC
dc.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.
dc.source.urihttps://doi.org/10.1016/j.physletb.2019.07.031
dc.titleMeasurement of prompt photon production in √sNN = 8.16 TeV p + Pb collisions with ATLAS
dc.title.alternativeMeasurement of prompt photon production in root sNN = 8.16 TeV p + Pb collisions with ATLAS
dc.typeJournal article
pubs.publication-statusPublished

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