Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector

Measurements of the centrality and rapidity dependence of inclusive jet production in s NN =5.02 TeV proton–lead (p+Pb) collisions and the jet cross-section in s=2.76 TeV proton–proton collisions are presented. These quantities are measured in datasets corresponding to an integrated luminosity of 27...

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Publicado: 2015
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v748_n_p392_Aad
http://hdl.handle.net/20.500.12110/paper_03702693_v748_n_p392_Aad
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_03702693_v748_n_p392_Aad2023-06-08T15:37:19Z Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector Measurements of the centrality and rapidity dependence of inclusive jet production in s NN =5.02 TeV proton–lead (p+Pb) collisions and the jet cross-section in s=2.76 TeV proton–proton collisions are presented. These quantities are measured in datasets corresponding to an integrated luminosity of 27.8 nb −1 and 4.0 pb −1 , respectively, recorded with the ATLAS detector at the Large Hadron Collider in 2013. The p+Pb collision centrality was characterised using the total transverse energy measured in the pseudorapidity interval −4.9 <η <−3.2 in the direction of the lead beam. Results are presented for the double-differential per-collision yields as a function of jet rapidity and transverse momentum (p T ) for minimum-bias and centrality-selected p+Pb collisions, and are compared to the jet rate from the geometric expectation. The total jet yield in minimum-bias events is slightly enhanced above the expectation in a p T -dependent manner but is consistent with the expectation within uncertainties. The ratios of jet spectra from different centrality selections show a strong modification of jet production at all p T at forward rapidities and for large p T at mid-rapidity, which manifests as a suppression of the jet yield in central events and an enhancement in peripheral events. These effects imply that the factorisation between hard and soft processes is violated at an unexpected level in proton–nucleus collisions. Furthermore, the modifications at forward rapidities are found to be a function of the total jet energy only, implying that the violations may have a simple dependence on the hard parton–parton kinematics. © 2015 CERN for the benefit of the ATLAS Collaboration 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v748_n_p392_Aad http://hdl.handle.net/20.500.12110/paper_03702693_v748_n_p392_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Measurements of the centrality and rapidity dependence of inclusive jet production in s NN =5.02 TeV proton–lead (p+Pb) collisions and the jet cross-section in s=2.76 TeV proton–proton collisions are presented. These quantities are measured in datasets corresponding to an integrated luminosity of 27.8 nb −1 and 4.0 pb −1 , respectively, recorded with the ATLAS detector at the Large Hadron Collider in 2013. The p+Pb collision centrality was characterised using the total transverse energy measured in the pseudorapidity interval −4.9 <η <−3.2 in the direction of the lead beam. Results are presented for the double-differential per-collision yields as a function of jet rapidity and transverse momentum (p T ) for minimum-bias and centrality-selected p+Pb collisions, and are compared to the jet rate from the geometric expectation. The total jet yield in minimum-bias events is slightly enhanced above the expectation in a p T -dependent manner but is consistent with the expectation within uncertainties. The ratios of jet spectra from different centrality selections show a strong modification of jet production at all p T at forward rapidities and for large p T at mid-rapidity, which manifests as a suppression of the jet yield in central events and an enhancement in peripheral events. These effects imply that the factorisation between hard and soft processes is violated at an unexpected level in proton–nucleus collisions. Furthermore, the modifications at forward rapidities are found to be a function of the total jet energy only, implying that the violations may have a simple dependence on the hard parton–parton kinematics. © 2015 CERN for the benefit of the ATLAS Collaboration
title Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector
spellingShingle Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector
title_short Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector
title_full Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector
title_fullStr Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector
title_full_unstemmed Centrality and rapidity dependence of inclusive jet production in √sNN =5 .02 TeV proton–lead collisions with the ATLAS detector
title_sort centrality and rapidity dependence of inclusive jet production in √snn =5 .02 tev proton–lead collisions with the atlas detector
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v748_n_p392_Aad
http://hdl.handle.net/20.500.12110/paper_03702693_v748_n_p392_Aad
_version_ 1768542694377783296

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