Abstract
The ALICE Collaboration reports measurements of the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum (high pT) charged hadron, in pp and central Pb-Pb collisions at center-of-mass energy per nucleon-nucleon collision sNN=5.02 TeV. The large uncorrelated background in central Pb-Pb collisions is corrected using a data-driven statistical approach which enables precise measurement of recoil jet distributions over a broad range in pT,chjet and jet resolution parameter R. Recoil jet yields are reported for R=0.2, 0.4, and 0.5 in the range 7<pT,chjet<140 GeV/c and π/2<Δφ<π, where Δφ is the azimuthal angular separation between hadron trigger and recoil jet. The low-pT,chjet reach of the measurement explores unique phase space for studying jet quenching, the interaction of jets with the quark-gluon plasma generated in high-energy nuclear collisions. Comparison of pT,chjet distributions from pp and central Pb-Pb collisions probes medium-induced jet energy loss and intra-jet broadening, while comparison of their acoplanarity distributions explores in-medium jet scattering and medium response. The measurements are compared to theoretical calculations incorporating jet quenching.
Original language | English |
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Article number | 014906 |
Journal | Physical Review C |
Volume | 110 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jul 2024 |
Bibliographical note
Publisher Copyright:© 2024 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by CERN.
Funding
The ALICE Collaboration would like to thank all its engineers and technicians for their invaluable contributions to the construction of the experiment and the CERN accelerator teams for the outstanding performance of the LHC complex. The ALICE Collaboration gratefully acknowledges the resources and support provided by all Grid centres and the Worldwide LHC Computing Grid (WLCG) Collaboration. The ALICE Collaboration acknowledges the following funding agencies for their support in building and running the ALICE detector: A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467-N36] and Nationalstiftung fur Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) and Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Bulgarian Ministry of Education and Science, within the National Roadmap for Research Infrastructures 2020-2027 (object CERN), Bulgaria; Ministry of Education of China (MOEC), Ministry of Science & Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnologicas y Desarrollo Nuclear (CEADEN), Cubaenergia, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research-Natural Sciences, the VILLUM FONDEN and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat a l'Energie Atomique (CEA) and Institut National de Physique Nucleaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium fur Bildung und Forschung (BMBF) and GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research, Development and Innovation Office, Hungary; Department of Atomic Energy Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; National Research and Innovation Agency -BRIN, Indonesia; Istituto Nazionale di Fisica Nucleare (INFN), Italy; Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAKENHI, Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnologia, through Fondo de Cooperacion Internacional en Ciencia y Tecnologia (FONCICYT) and Direccion General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan; Pontificia Universidad Catolica del Peru, Peru; Ministry of Education and Science, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics, Ministry of Research and Innovation and Institute of Atomic Physics and University Politehnica of Bucharest, Romania; Ministry of Education, of the jet-medium interaction. A successful model of jet quenching must describe this full set of data correctly. A global analysis is required to ascertain whether a fully consistent description of all such data can be achieved by a suitable choice of model parameters, or whether the jet quenching mechanisms encoded in the model can be excluded by such a comprehensive comparison to multi-messenger jet quenching data.
Funders | Funder number |
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Council of Scientific and Industrial Research, India | |
State Committee of Science and World Federation | |
Ministry of Communications and High Technologies | |
Ministry of education and science | |
Department of Atomic Energy, Government of India | |
National Academy of Sciences of Ukraine | |
Thailand Science Research and Innovation | |
National Science and Technology Development Agency | |
National Research Foundation of Korea | |
VILLUM FONDEN | |
National Science, Research and Innovation Fund | |
Ministry of Education of the People's Republic of China | |
Narodowe Centrum Nauki | |
University Grants Commission | |
Nationalstiftung fer Forschung, Technologie und Entwicklung | |
Institut national de physique nucléaire et de physique des particules | |
Science and Technology Facilities Council | |
General Secretariat for Research and Technology, Ministry of Education, Research and Religions | |
Japan Society for the Promotion of Science | |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek | |
Korea Institute of Science and Technology Information | |
Knut och Alice Wallenbergs Stiftelse | |
Ministry of Science and Education and Croatian Science Foundation | |
Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences | |
Instituto Nazionale di Fisica Nucleare | |
Danmarks Frie Forskningsfond | |
Financiadora de Estudos e Projetos | |
Ontario Ministry of Research and Innovation | |
Department of Science and Technology, Ministry of Science and Technology, India | |
Consejo Nacional de Humanidades, Ciencias y Tecnologías | |
Norges Forskningsråd | |
Yerevan Physics Institute | |
Natur og Univers, Det Frie Forskningsråd | |
Centre National de la Recherche Scientifique | |
Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México | |
Bundesministerium für Bildung und Forschung | |
Commissariat à l'Énergie Atomique et aux Énergies Alternatives | |
Danmarks Grundforskningsfond | |
Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
Suranaree University of Technology | |
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear | |
Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu | |
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal | |
Ministry of Higher Education and Scientific Research | |
European Commission | |
GSI Helmholtzzentrum für Schwerionenforschung | |
U.S. Department of Energy | |
Institute of Atomic Physics and University Politehnica of Bucharest | |
Fundação de Amparo à Pesquisa do Estado de São Paulo | |
National Nuclear Research Center | |
WUT ID-UB | |
Institutul de Fizică Atomică | |
Ministry of Science and Technology of the People's Republic of China | |
Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic | |
NSRF | |
Ministry of Education, Science, Research and Sport | |
Helsinki Institute of Physics | |
Fondo de Cooperación Internacional en Ciencia y Tecnología | |
Universidade Federal do Rio Grande do Sul | |
Österreichischen Akademie der Wissenschaften | |
University Grants Commission, Government of India | |
European Research Council | |
National Research Foundation | |
Badan Riset dan Inovasi Nasional | |
CERN | |
Nuclear Physics | |
Vetenskapsrådet | |
Österreichische Nationalstiftung für Forschung, Technologie und Entwicklung | |
Ministry of Education, Culture, Sports, Science and Technology | |
National Natural Science Foundation of China | |
Horizon 2020 | 824093, 950692 |
Research Council of Finland | 346328, 346327 |
Austrian Science Fund | M 2467-N36 |