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Article: Measurement of the nuclear modification factor of b-jets in 5.02 TeV Pb+Pb collisions with the ATLAS detector

TitleMeasurement of the nuclear modification factor of b-jets in 5.02 TeV Pb+Pb collisions with the ATLAS detector
Authors
Issue Date25-May-2023
PublisherSpringerOpen
Citation
The European Physical Journal C, 2023, v. 83, n. 5 How to Cite?
Abstract

This paper presents a measurement of b-jet production in Pb+Pb and pp collisions at root s(NN) = 5.02 TeV with the ATLAS detector at the LHC. The measurement uses 260 pb(-1) of pp collisions collected in 2017 and 1.4 nb(-1) of Pb+Pb collisions collected in 2018. In both collision systems, jets are reconstructed via the anti-kt algorithm. The b-jets are identified from a sample of jets containing muons from the semileptonic decay of b-quarks using template fits of the muon momentum relative to the jet axis. In pp collisions, b-jets are reconstructed for radius parameters R=0.2 and R=0.4, and only R=0.2 jets are used in Pb+Pb collisions. For comparison, inclusive R=0.2 jets are also measured using 1.7 nb(-1) of Pb+Pb collisions collected in 2018 and the same pp collision data as the b-jet measurement. The nuclear modification factor, RAA, is calculated for both b-jets and inclusive jets with R=0.2 over the transverse momentum range of 80-290 GeV. The nuclear modification factor for b-jets decreases from peripheral to central collisions. The ratio of the b-jet RAA to inclusive jet RAA is also presented and suggests that the RAA for b-jets is larger than that for inclusive jets in central Pb+Pb collisions. The measurements are compared with theoretical calculations and suggest a role for mass and colour-charge effects in partonic energy loss in heavy-ion collisions.


Persistent Identifierhttp://hdl.handle.net/10722/338517
ISSN
2023 Impact Factor: 4.2
2023 SCImago Journal Rankings: 1.451
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorAad, G-
dc.contributor.authorAbbott, B-
dc.contributor.authorAbbott, DC-
dc.contributor.authorAbeling, K-
dc.contributor.authorAbidi, SH-
dc.contributor.authorAboulhorma, A-
dc.contributor.authorAbramowicz, H-
dc.contributor.authorAbreu, H-
dc.contributor.authorAbulaiti, Y-
dc.contributor.authorAbusleme, Hoffman AC-
dc.contributor.authorAcharya, BS-
dc.contributor.authorAchkar, B-
dc.contributor.authorAdam, L-
dc.contributor.authorAdam, Bourdarios C-
dc.contributor.authorAdamczyk, L-
dc.contributor.authorAdamek, L-
dc.contributor.authorAddepalli, SV-
dc.contributor.authorAdelman, J-
dc.contributor.authorAdiguzel, A-
dc.contributor.authorAdorni, S-
dc.contributor.authorAdye, T-
dc.contributor.authorAffolder, AA-
dc.contributor.authorAfik, Y-
dc.contributor.authorAgaras, MN-
dc.contributor.authorAgarwala, J-
dc.contributor.authorAggarwal, A-
dc.contributor.authorAgheorghiesei, C-
dc.contributor.authorAguilar-Saavedra, JA-
dc.contributor.authorAhmad, A-
dc.contributor.authorAhmadov, F-
dc.contributor.authorAhmed, WS-
dc.contributor.authorAi, X-
dc.contributor.authorAielli, G-
dc.contributor.authorAizenberg, I-
dc.contributor.authorAkbiyik, M-
dc.contributor.authorAkesson, TPA-
dc.contributor.authorAkimov, AV-
dc.contributor.authorAl, Khoury K-
dc.contributor.authorAlberghi, GL-
dc.contributor.authorAlbert, J-
dc.contributor.authorAlbicocco, P-
dc.contributor.authorAlconada, Verzini MJ-
dc.contributor.authorAlderweireldt, S-
dc.contributor.authorAleksa, M-
dc.contributor.authorAleksandrov, IN-
dc.contributor.authorAlexa, C-
dc.contributor.authorAlexopoulos, T-
dc.contributor.authorAlfonsi, A-
dc.contributor.authorAlfonsi, F-
dc.contributor.authorAlhroob, M-
dc.contributor.authorAli, B-
dc.contributor.authorAli, S-
dc.contributor.authorAliev, M-
dc.contributor.authorAlimonti, G-
dc.contributor.authorAllaire, C-
dc.contributor.authorAllbrooke, BMM-
dc.contributor.authorAllport, PP-
dc.contributor.authorAloisio, A-
dc.contributor.authorAlonso, F-
dc.contributor.authorAlpigiani, C-
dc.contributor.authorAlunno, Camelia E-
dc.contributor.authorAlvarez, Estevez M-
dc.contributor.authorAlviggi, MG-
dc.contributor.authorAmaral, Coutinho Y-
dc.contributor.authorAmbler, A-
dc.contributor.authorAmelung, C-
dc.contributor.authorAmes, CG-
dc.contributor.authorAmidei, D-
dc.contributor.authorAmor, Dos Santos SP-
dc.contributor.authorAmoroso, S-
dc.contributor.authorAmos, KR-
dc.contributor.authorAmrouche, CS-
dc.contributor.authorAnaniev, V-
dc.contributor.authorAnastopoulos, C-
dc.contributor.authorAndari, N-
dc.contributor.authorAndeen, T-
dc.contributor.authorAnders, JK-
dc.contributor.authorAndrean, SY-
dc.contributor.authorAndreazza, A-
dc.contributor.authorAngelidakis, S-
dc.contributor.authorAngerami, A-
dc.contributor.authorAnisenkov, AV-
dc.contributor.authorAnnovi, A-
dc.contributor.authorAntel, C-
dc.contributor.authorAnthony, MT-
dc.contributor.authorAntipov, E-
dc.contributor.authorAntonelli, M-
dc.contributor.authorAntrim, DJA-
dc.contributor.authorAnulli, F-
dc.contributor.authorAoki, M-
dc.contributor.authorAparisi, Pozo JA-
dc.contributor.authorAparo, MA-
dc.contributor.authorAperio, Bella L-
dc.contributor.authorAppelt, C-
dc.contributor.authorAranzabal, N-
dc.contributor.authorAraujo, Ferraz V-
dc.contributor.authorArcangeletti, C-
dc.contributor.authorArce, ATH-
dc.contributor.authorArena, E-
dc.contributor.authorHuang, S-
dc.contributor.authorParedes Hernandez, D-
dc.contributor.authorPeng, C-
dc.contributor.authorTam, KC-
dc.contributor.authorTu, Y-
dc.contributor.authoret al-
dc.date.accessioned2024-03-11T10:29:28Z-
dc.date.available2024-03-11T10:29:28Z-
dc.date.issued2023-05-25-
dc.identifier.citationThe European Physical Journal C, 2023, v. 83, n. 5-
dc.identifier.issn1434-6044-
dc.identifier.urihttp://hdl.handle.net/10722/338517-
dc.description.abstract<p>This paper presents a measurement of b-jet production in Pb+Pb and pp collisions at root s(NN) = 5.02 TeV with the ATLAS detector at the LHC. The measurement uses 260 pb(-1) of pp collisions collected in 2017 and 1.4 nb(-1) of Pb+Pb collisions collected in 2018. In both collision systems, jets are reconstructed via the anti-kt algorithm. The b-jets are identified from a sample of jets containing muons from the semileptonic decay of b-quarks using template fits of the muon momentum relative to the jet axis. In pp collisions, b-jets are reconstructed for radius parameters R=0.2 and R=0.4, and only R=0.2 jets are used in Pb+Pb collisions. For comparison, inclusive R=0.2 jets are also measured using 1.7 nb(-1) of Pb+Pb collisions collected in 2018 and the same pp collision data as the b-jet measurement. The nuclear modification factor, RAA, is calculated for both b-jets and inclusive jets with R=0.2 over the transverse momentum range of 80-290 GeV. The nuclear modification factor for b-jets decreases from peripheral to central collisions. The ratio of the b-jet RAA to inclusive jet RAA is also presented and suggests that the RAA for b-jets is larger than that for inclusive jets in central Pb+Pb collisions. The measurements are compared with theoretical calculations and suggest a role for mass and colour-charge effects in partonic energy loss in heavy-ion collisions.</p>-
dc.languageeng-
dc.publisherSpringerOpen-
dc.relation.ispartofThe European Physical Journal C-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleMeasurement of the nuclear modification factor of b-jets in 5.02 TeV Pb+Pb collisions with the ATLAS detector-
dc.typeArticle-
dc.identifier.doi10.1140/epjc/s10052-023-11427-9-
dc.identifier.scopuseid_2-s2.0-85160422771-
dc.identifier.volume83-
dc.identifier.issue5-
dc.identifier.eissn1434-6052-
dc.identifier.isiWOS:001022781200001-
dc.publisher.placeNEW YORK-
dc.identifier.issnl1434-6044-

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