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Article: Measurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS

TitleMeasurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS
Authors
Issue Date2019
PublisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb
Citation
Physics Letters B, 2019, v. 789, p. 167-190 How to Cite?
AbstractJets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb−1 of Pb + Pb collision data at sNN=5.02 TeV and 25 pb−1 of pp collision data at s=5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.131.6 GeV and pseudorapidity |ηjet|<2.8. The transverse momentum balance given by the jet-to-photon pT ratio, xJγ, is measured for pairs with azimuthal opening angle Δϕ>7π/8. Distributions of the per-photon jet yield as a function of xJγ, (1/Nγ)(dN/dxJγ), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the xJγ distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations.
Persistent Identifierhttp://hdl.handle.net/10722/267453
ISSN
2020 Impact Factor: 4.771
2020 SCImago Journal Rankings: 2.093
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorATLAS Collaboration-
dc.contributor.authorLo, CY-
dc.contributor.authorOrlando, N-
dc.contributor.authorParedes Hernandez, DK-
dc.contributor.authorTu, Y-
dc.date.accessioned2019-02-18T09:02:21Z-
dc.date.available2019-02-18T09:02:21Z-
dc.date.issued2019-
dc.identifier.citationPhysics Letters B, 2019, v. 789, p. 167-190-
dc.identifier.issn0370-2693-
dc.identifier.urihttp://hdl.handle.net/10722/267453-
dc.description.abstractJets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb−1 of Pb + Pb collision data at sNN=5.02 TeV and 25 pb−1 of pp collision data at s=5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.1<pT γ<200 GeV and |ηγ|<2.37 are paired with all jets in the event that have pT jet>31.6 GeV and pseudorapidity |ηjet|<2.8. The transverse momentum balance given by the jet-to-photon pT ratio, xJγ, is measured for pairs with azimuthal opening angle Δϕ>7π/8. Distributions of the per-photon jet yield as a function of xJγ, (1/Nγ)(dN/dxJγ), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the xJγ distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations.-
dc.languageeng-
dc.publisherElsevier: SCOAP3. The Journal's web site is located at http://www.elsevier.com/locate/physletb-
dc.relation.ispartofPhysics Letters B-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleMeasurement of photon–jet transverse momentum correlations in 5.02 TeV Pb + Pb and pp collisions with ATLAS-
dc.typeArticle-
dc.identifier.emailOrlando, N: norlando@hku.hk-
dc.identifier.emailParedes Hernandez, DK: dparedes@hku.hk-
dc.identifier.emailTu, Y: yanjuntu@hku.hk-
dc.identifier.authorityTu, Y=rp01971-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1016/j.physletb.2018.12.023-
dc.identifier.scopuseid_2-s2.0-85058927090-
dc.identifier.hkuros296988-
dc.identifier.volume789-
dc.identifier.spage167-
dc.identifier.epage190-
dc.identifier.isiWOS:000457165400023-
dc.publisher.placeNetherlands-
dc.identifier.issnl0370-2693-

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