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Article: Dijet azimuthal correlations and conditional yields in pp and p + Pb collisions at √sNN = 5.02 TeV with the ATLAS detector

TitleDijet azimuthal correlations and conditional yields in pp and p + Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
Authors
KeywordsCollisions
Jets
Proton–proton collisions
Issue Date2019
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prc/
Citation
Physical Review C: covering nuclear physics, 2019, v. 100 n. 3, p. 034903:1-034903:24 How to Cite?
AbstractThis paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p+Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25pb-1 of pp data and 360μb-1 of p+Pb data, both at sNN=5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p+Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p+Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets. © 2019 CERN.
Persistent Identifierhttp://hdl.handle.net/10722/278945
ISSN
2020 Impact Factor: 3.296
2020 SCImago Journal Rankings: 1.679
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLO, CY-
dc.contributor.authorParedes Hernandez, D-
dc.contributor.authorTu, Y-
dc.contributor.authorSalvucci, A-
dc.contributor.authorATLAS Collaboration-
dc.date.accessioned2019-10-21T02:16:49Z-
dc.date.available2019-10-21T02:16:49Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review C: covering nuclear physics, 2019, v. 100 n. 3, p. 034903:1-034903:24-
dc.identifier.issn2469-9985-
dc.identifier.urihttp://hdl.handle.net/10722/278945-
dc.description.abstractThis paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p+Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25pb-1 of pp data and 360μb-1 of p+Pb data, both at sNN=5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p+Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p+Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets. © 2019 CERN.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prc/-
dc.relation.ispartofPhysical Review C: covering nuclear physics-
dc.rightsPhysical Review C: covering nuclear physics. Copyright © American Physical Society.-
dc.rightsCopyright [2019] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevC.100.034903].-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectCollisions-
dc.subjectJets-
dc.subjectProton–proton collisions-
dc.titleDijet azimuthal correlations and conditional yields in pp and p + Pb collisions at √sNN = 5.02 TeV with the ATLAS detector-
dc.typeArticle-
dc.identifier.emailParedes Hernandez, D: dparedes@hku.hk-
dc.identifier.emailTu, Y: yanjuntu@hku.hk-
dc.identifier.authorityTu, Y=rp01971-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevC.100.034903-
dc.identifier.scopuseid_2-s2.0-85072663506-
dc.identifier.hkuros307146-
dc.identifier.volume100-
dc.identifier.issue3-
dc.identifier.spage034903:1-
dc.identifier.epage034903:24-
dc.identifier.isiWOS:000485195900003-
dc.publisher.placeUnited States-
dc.identifier.issnl2469-9985-

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