Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low- p T Jets from Measurements in pp and Central Pb-Pb Collisions at sNN =5.02 TeV

(ALICE Collaboration)

doi:10.1103/PhysRevLett.133.022301

Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low- p T Jets from Measurements in pp and Central Pb-Pb Collisions at sNN =5.02 TeV

(ALICE Collaboration)

Relativistic Nuclear Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum (high pT) hadron trigger in proton-proton and central Pb-Pb collisions at sNN=5.02 TeV. A data-driven statistical method is used to mitigate the large uncorrelated background in central Pb-Pb collisions. Recoil jet distributions are reported for jet resolution parameter R=0.2, 0.4, and 0.5 in the range 7<pT,jet<140 GeV/c and trigger-recoil jet azimuthal separation π/2<Δφ<π. The measurements exhibit a marked medium-induced jet yield enhancement at low pT and at large azimuthal deviation from Δφ∼π. The enhancement is characterized by its dependence on Δφ, which has a slope that differs from zero by 4.7σ. Comparisons to model calculations incorporating different formulations of jet quenching are reported. These comparisons indicate that the observed yield enhancement arises from the response of the QGP medium to jet propagation.

Original language	English
Article number	022301
Journal	Physical Review Letters
Volume	133
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.133.022301
State	Published - Jul 12 2024

Funding

We thank Daniel Pablos, Krishna Rajagopal, Zachary Hulcher, Shuyi Wei, and Guangyou Qin for providing theoretical calculations. We thank the jetscape Collaboration for guidance in using the jetscape framework, and Raghav Kunnawalkam Elayavalli for providing the medium parameters for jewel simulations. 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.\u2009I. 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): [Grant DOI: 10.55776/M 2467-N36] and Nationalstiftung f\u00FCr Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Cient\u00EDfico e Tecnol\u00F3gico (CNPq), Financiadora de Estudos e Projetos (Finep), Funda\u00E7\u00E3o de Amparo \u00E0 Pesquisa do Estado de S\u00E3o 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\u20132027 (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 Tecnol\u00F3gicas y Desarrollo Nuclear (CEADEN), Cubaenerg\u00EDa, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research\u2014Natural Sciences, the VILLUM FONDEN and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat \u00E0 l\u2019Energie Atomique (CEA) and Institut National de Physique Nucl\u00E9aire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium f\u00FCr Bildung und Forschung (BMBF) and GSI Helmholtzzentrum f\u00FCr 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\u2014BRIN, 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 Tecnolog\u00EDa, through Fondo de Cooperaci\u00F3n Internacional en Ciencia y Tecnolog\u00EDa (FONCICYT) and Direcci\u00F3n 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 Cat\u00F3lica del Per\u00FA, 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, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSTDA) and National Science, Research and Innovation Fund (NSRF via PMU-B B05F650021), Thailand; Turkish Energy, Nuclear and Mineral Research Agency (TENMAK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the USA (NSF) and U.S. Department of Energy, Office of Nuclear Physics (DOE NP), USA. In addition, individual groups or members have received support from European Research Council, Strong 2020\u2014Horizon 2020 (Grant No. 950692, No. 824093), European Union; Academy of Finland (Center of Excellence in Quark Matter) (Grants No. 346327, No. 346328), Finland. We thank Daniel Pablos, Krishna Rajagopal, Zachary Hulcher, Shuyi Wei, and Guangyou Qin for providing theoretical calculations. We thank the jetscape Collaboration for guidance in using the jetscape framework, and Raghav Kunnawalkam Elayavalli for providing the medium parameters for jewel simulations. 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): [Grant DOI: 10.55776/M 2467-N36] and Nationalstiftung for Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Conselho Nacional de Desenvolvimento Cientifico e Tecnolegico (CNPq), Financiadora de Estudos e Projetos (Finep), Fundacao de Amparo 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 Tecnolegicas 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 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 for Bildung und Forschung (BMBF) and GSI Helmholtzzentrum for 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 Cooperacien Internacional en Ciencia y Tecnologia (FONCICYT) and Direccien 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 Catelica del Pere, 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, Science, Research and Sport of the Slovak Republic, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSTDA) and National Science, Research and Innovation Fund (NSRF via PMU-B B05F650021), Thailand; Turkish Energy, Nuclear and Mineral Research Agency (TENMAK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the USA (NSF) and U.S. Department of Energy, Office of Nuclear Physics (DOE NP), USA. In addition, individual groups or members have received support from European Research Council, Strong 2020-Horizon 2020 (Grant No. 950692, No. 824093), European Union; Academy of Finland (Center of Excellence in Quark Matter) (Grants No. 346327, No. 346328), Finland.

Funders	Funder number
Council of Scientific and Industrial Research, India
State Committee of Science and World Federation
National Research and Innovation Agency-BRIN
DST
Ministry of Communications and High Technologies
Ministry of Education and Science
UGC
IN2P3
Department of Atomic Energy, Government of India
European Organization for Nuclear Research
National Academy of Sciences of Ukraine
Danish Council for Independent Research
National Science and Technology Development Agency
National Research Foundation of Korea
Villum Fonden
National Science, Research and Innovation Fund
African Academy of Sciences
Ministry of Education of the People's Republic of China
Dirección General de Asuntos del Personal Academico
Direccien General de Asuntos del Personal Academico
National Science Foundation
Institut National de Physique Nucléaire et de Physique des Particules
Danish Council for Independent Research-Natural Sciences
Science and Technology Facilities Council
European Research Council, Strong 2020-Horizon 2020
General Secretariat for Research and Technology, Ministry of Education, Research and Religions
Japan Society for the Promotion of Science
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
CONACYT
Korea Institute of Science and Technology Information
Ministry of Science and Education and Croatian Science Foundation
Instituto Nazionale di Fisica Nucleare
Austrian Science Fund
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
DAE
Helsinki Institute of Physics
Norges Forskningsråd
Yerevan Physics Institute
Centre National de la Recherche Scientifique
Bundesministerium für Bildung und Forschung
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
VR
Danmarks Grundforskningsfond
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Suranaree University of Technology
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
DOE NP
Ministry of Higher Education and Scientific Research
European Commission
NSFC
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
Turkish Energy, Nuclear and Mineral Research Agency
MEXT
National Nuclear Research Center
WUT ID-UB
Ministry of Science and Technology of the People's Republic of China
Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic
Ministry of Education, Science, Research and Sport
Institute of Atomic Physics
Commissariat l'Energie Atomique
Fondo de Cooperación Internacional en Ciencia y Tecnología
Universidade Federal do Rio Grande do Sul
Nationalstiftung for Forschung, Technologie und Entwicklung
BRIN
National Research and Innovation Agency
University Grants Commission, Government of India
European Research Council
National Research Foundation
National Science Centre
Natural Sciences
CERN
Nuclear Physics
National Research, Development and Innovation Office
Swedish Research Council
Knut & Alice Wallenberg Foundation
Österreichische Nationalstiftung für Forschung, Technologie und Entwicklung
TENMAK
CNPq
Ministry of Education, Culture, Sports, Science and Technology
National Natural Science Foundation of China
NSRF	B05F650021
Horizon 2020	824093, 950692
Horizon 2020
Research Council of Finland	346328, 346327
Research Council of Finland
FWF	10.55776/M 2467-N36

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10.1103/PhysRevLett.133.022301

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@article{997184a6634b451fb6d0af5075d87da7,

title = "Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low- p T Jets from Measurements in pp and Central Pb-Pb Collisions at sNN =5.02 TeV",

abstract = "The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum (high pT) hadron trigger in proton-proton and central Pb-Pb collisions at sNN=5.02 TeV. A data-driven statistical method is used to mitigate the large uncorrelated background in central Pb-Pb collisions. Recoil jet distributions are reported for jet resolution parameter R=0.2, 0.4, and 0.5 in the range 7",

author = "{(ALICE Collaboration)} and S. Acharya and D. Adamov{\'a} and {Aglieri Rinella}, G. and M. Agnello and N. Agrawal and Z. Ahammed and S. Ahmad and Ahn, {S. U.} and I. Ahuja and A. Akindinov and M. Al-Turany and D. Aleksandrov and B. Alessandro and Alfanda, {H. M.} and {Alfaro Molina}, R. and B. Ali and A. Alici and N. Alizadehvandchali and A. Alkin and J. Alme and G. Alocco and T. Alt and Altamura, {A. R.} and I. Altsybeev and Alvarado, {J. R.} and Anaam, {M. N.} and C. Andrei and N. Andreou and A. Andronic and V. Anguelov and F. Antinori and P. Antonioli and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and C. Arata and S. Arcelli and M. Aresti and R. Arnaldi and Arneiro, {J. G.M.C.A.} and Arsene, {I. C.} and M. Arslandok and A. Augustinus and R. Averbeck and Azmi, {M. D.} and H. Baba and A. Badal{\`a} and F. Bock and Read, {K. F.} and Schmidt, {N. V.}",

note = "Publisher Copyright: {\textcopyright} 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.",

year = "2024",

month = jul,

day = "12",

doi = "10.1103/PhysRevLett.133.022301",

language = "English",

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issn = "0031-9007",

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T1 - Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low- p T Jets from Measurements in pp and Central Pb-Pb Collisions at sNN =5.02 TeV

AU - (ALICE Collaboration)

AU - Acharya, S.

AU - Adamová, D.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, S.

AU - Ahn, S. U.

AU - Ahuja, I.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfanda, H. M.

AU - Alfaro Molina, R.

AU - Ali, B.

AU - Alici, A.

AU - Alizadehvandchali, N.

AU - Alkin, A.

AU - Alme, J.

AU - Alocco, G.

AU - Alt, T.

AU - Altamura, A. R.

AU - Altsybeev, I.

AU - Alvarado, J. R.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andreou, N.

AU - Andronic, A.

AU - Anguelov, V.

AU - Antinori, F.

AU - Antonioli, P.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arata, C.

AU - Arcelli, S.

AU - Aresti, M.

AU - Arnaldi, R.

AU - Arneiro, J. G.M.C.A.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Baba, H.

AU - Badalà, A.

AU - Bock, F.

AU - Read, K. F.

AU - Schmidt, N. V.

N1 - 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.

PY - 2024/7/12

Y1 - 2024/7/12

N2 - The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum (high pT) hadron trigger in proton-proton and central Pb-Pb collisions at sNN=5.02 TeV. A data-driven statistical method is used to mitigate the large uncorrelated background in central Pb-Pb collisions. Recoil jet distributions are reported for jet resolution parameter R=0.2, 0.4, and 0.5 in the range 7

AB - The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum (high pT) hadron trigger in proton-proton and central Pb-Pb collisions at sNN=5.02 TeV. A data-driven statistical method is used to mitigate the large uncorrelated background in central Pb-Pb collisions. Recoil jet distributions are reported for jet resolution parameter R=0.2, 0.4, and 0.5 in the range 7

UR - http://www.scopus.com/inward/record.url?scp=85198282865&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.133.022301

DO - 10.1103/PhysRevLett.133.022301

M3 - Article

AN - SCOPUS:85198282865

SN - 0031-9007

VL - 133

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

M1 - 022301

ER -

Observation of Medium-Induced Yield Enhancement and Acoplanarity Broadening of Low- p T Jets from Measurements in pp and Central Pb-Pb Collisions at sNN =5.02 TeV

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