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Medium-Induced Modification of Z-Tagged Charged Particle Yields in Pb plus Pb Collisions at 5.02 TeV with the ATLAS Detector
Aix Marseille Univ, IN2P3, CNRS, CPPM, Marseille, France..
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-5935-7464
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Number of Authors: 29452021 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 126, no 7, article id 072301Article in journal (Refereed) Published
Abstract [en]

The yield of charged particles opposite to a Z boson with large transverse momentum (p(T)) is measured in 260 pb(-1) of pp and 1.7 nb(-1) of Pb + Pb collision data at 5.02 TeV per nucleon pair recorded with the ATLAS detector at the Large Hadron Collider. The Z boson tag is used to select hard-scattered partons with specific kinematics, and to observe how their showers are modified as they propagate through the quarkgluon plasma created in Pb + Pb collisions. Compared with pp collisions, charged-particle yields in Pb + Pb collisions show significant modifications as a function of charged-particle p(T) in a way that depends on event centrality and Z boson p(T). The data are compared with a variety of theoretical calculations and provide new information about the medium-induced energy loss of partons in a p(T) regime difficult to measure through other channels.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2021. Vol. 126, no 7, article id 072301
National Category
Subatomic Physics
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URN: urn:nbn:se:kth:diva-291900DOI: 10.1103/PhysRevLett.126.072301ISI: 000620021300012PubMedID: 33666476Scopus ID: 2-s2.0-85102409313OAI: oai:DiVA.org:kth-291900DiVA, id: diva2:1539176
Note

QC 20210323

Available from: 2021-03-23 Created: 2021-03-23 Last updated: 2022-06-25Bibliographically approved

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Jensen, BengtOhm, ChristianRipellino, GiuliaShope, David R.Strandberg, Jonas

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