Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s = 13 TeV and in p–Pb collisions at √sNN = 5.02 TeV

ALICE Collaboration

doi:10.1007/JHEP03(2024)092

Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s = 13 TeV and in p–Pb collisions at √sNN = 5.02 TeV

ALICE Collaboration

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

Abstract

Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at s = 13 TeV and p–Pb collisions at s_NN = 5.02 TeV. The correlation functions are measured as a function of relative azimuthal angle ∆φ and pseudorapidity separation ∆η for pairs of primary charged particles within the pseudorapidity interval |η| < 0.9 and the transverse-momentum interval 1 < p_T< 4 GeV/c. Flow coefficients are extracted for the long-range correlations (1.6 < |∆η| < 1.8) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events.

Original language	English
Article number	92
Number of pages	35
Journal	Journal of High Energy Physics
Volume	2024
Issue number	3
DOIs	https://doi.org/10.1007/JHEP03(2024)092
Publication status	Published - 15 Mar 2024

Bibliographical note

Publisher Copyright:
© The Author(s) 2024.

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, 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 Sci ence, 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 United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America. In addition, individual groups or members have received support from: European Research Council, Strong 2020 - Horizon 2020 (grant nos. 950692, 824093), European Union; Academy of Finland (Center of Excellence in Quark Matter) (grant nos. 346327, 346328), Finland.

Funders	Funder number
A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), Armenia
State Committee of Science, Armenia
World Federation of Scientists (WFS), Armenia
Austrian Academy of Sciences, Austria
Austrian Science Fund (FWF), Austria	M 2467-N36
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), Brazil
Financiadora de Estudos e Projetos (Finep), Brazil
Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), Brazil
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), China
Ministry of Science & Technology of China (MSTC), China
National Natural Science Foundation of China (NSFC), China
Ministry of Science and Education, Croatia
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
Danish Council for Independent Research \| Natural Sciences, Denmark
VILLUM FONDEN, Denmark
Danish National Research Foundation (DNRF), Denmark
Helsinki Institute of Physics (HIP), Finland
Commissariat a l'Energie Atomique (CEA), France
Institut National de Physique Nucleaire et de Physique des Particules (IN2P3), France
Centre National de la Recherche Scientifique (CNRS), France
Bundesministerium fur Bildung und Forschung (BMBF), Germany
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)
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), Japan
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), Mexico
Direccion General de Asuntos del Personal Academico (DGAPA), Mexico
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands
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, Poland
National Science Centre, Poland
WUT ID-UB, Poland
Korea Institute of Science and Technology Information, Republic of Korea
National Research Foundation of Korea (NRF), Republic of Korea
Ministry of Education and Scientific Research, Romania
Institute of Atomic Physics, Romania
Ministry of Research and Innovation, Romania
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)
Knut & Alice Wallenberg Foundation (KAW), Sweden
European Organization for Nuclear Research, Switzerland
Suranaree University of Technology (SUT), Thailand
National Science and Technology Development Agency (NSTDA), Thailand
National Science, Research and Innovation Fund (NSRF), Thailand	PMU-B B05F650021
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 United States of America (NSF), United States of America
United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America
European Research Council, Strong 2020 - Horizon 2020, European Union	950692, 824093
Academy of Finland (Center of Excellence in Quark Matter) , Finland	346327, 346328

Keywords

Collective Flow
Hadron-Hadron Scattering
Jets

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JHEP03(2024)092Final published version, 1.33 MBLicence: CC BY

Cite this

@article{07e6ac9ca06640c686ca9e929e0f560b,

title = "Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s = 13 TeV and in p–Pb collisions at √sNN = 5.02 TeV",

abstract = "Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at s = 13 TeV and p–Pb collisions at sNN = 5.02 TeV. The correlation functions are measured as a function of relative azimuthal angle ∆φ and pseudorapidity separation ∆η for pairs of primary charged particles within the pseudorapidity interval |η| < 0.9 and the transverse-momentum interval 1 < pT< 4 GeV/c. Flow coefficients are extracted for the long-range correlations (1.6 < |∆η| < 1.8) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events.",

keywords = "Collective Flow, Hadron-Hadron Scattering, Jets",

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. Caliva and P. Christakoglou and A. Dobrin and L. Fabbietti and A. Grelli and R. Gupta and S. Jaelani and Keijdener, {D. L.D.} and Kuijer, {P. G.} and {La Pointe}, {S. L.} and G. Luparello and S. Muhuri and {Oliveira Da Silva}, {A. C.} and T. Peitzmann and N. Poljak and S. Qiu and Sas, {M. H.P.} and Snellings, {R. J.M.} and D. Thomas and {van Doremalen}, {L. V.R.} and L. Vermunt and M. Verweij and Bas Hofman and Johanna L{\"o}mker and Olaf Massen and {van Weelden}, Gijs and {van Leeuwen}, Marco and {Pliatskas Stylianidis}, Christos and Rik Spijkers and Mariia Selina and Artem Isakov",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = mar,

day = "15",

doi = "10.1007/JHEP03(2024)092",

language = "English",

volume = "2024",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "3",

}

TY - JOUR

T1 - Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s = 13 TeV and in p–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 - Caliva, A.

AU - Christakoglou, P.

AU - Dobrin, A.

AU - Fabbietti, L.

AU - Grelli, A.

AU - Gupta, R.

AU - Jaelani, S.

AU - Keijdener, D. L.D.

AU - Kuijer, P. G.

AU - La Pointe, S. L.

AU - Luparello, G.

AU - Muhuri, S.

AU - Oliveira Da Silva, A. C.

AU - Peitzmann, T.

AU - Poljak, N.

AU - Qiu, S.

AU - Sas, M. H.P.

AU - Snellings, R. J.M.

AU - Thomas, D.

AU - van Doremalen, L. V.R.

AU - Vermunt, L.

AU - Verweij, M.

AU - Hofman, Bas

AU - Lömker, Johanna

AU - Massen, Olaf

AU - van Weelden, Gijs

AU - van Leeuwen, Marco

AU - Pliatskas Stylianidis, Christos

AU - Spijkers, Rik

AU - Selina, Mariia

AU - Isakov, Artem

PY - 2024/3/15

Y1 - 2024/3/15

N2 - Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at s = 13 TeV and p–Pb collisions at sNN = 5.02 TeV. The correlation functions are measured as a function of relative azimuthal angle ∆φ and pseudorapidity separation ∆η for pairs of primary charged particles within the pseudorapidity interval |η| < 0.9 and the transverse-momentum interval 1 < pT< 4 GeV/c. Flow coefficients are extracted for the long-range correlations (1.6 < |∆η| < 1.8) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events.

AB - Long- and short-range correlations for pairs of charged particles are studied via two-particle angular correlations in pp collisions at s = 13 TeV and p–Pb collisions at sNN = 5.02 TeV. The correlation functions are measured as a function of relative azimuthal angle ∆φ and pseudorapidity separation ∆η for pairs of primary charged particles within the pseudorapidity interval |η| < 0.9 and the transverse-momentum interval 1 < pT< 4 GeV/c. Flow coefficients are extracted for the long-range correlations (1.6 < |∆η| < 1.8) in various high-multiplicity event classes using the low-multiplicity template fit method. The method is used to subtract the enhanced yield of away-side jet fragments in high-multiplicity events. These results show decreasing flow signals toward lower multiplicity events. Furthermore, the flow coefficients for events with hard probes, such as jets or leading particles, do not exhibit any significant changes compared to those obtained from high-multiplicity events without any specific event selection criteria. The results are compared with hydrodynamic-model calculations, and it is found that a better understanding of the initial conditions is necessary to describe the results, particularly for low-multiplicity events.

KW - Collective Flow

KW - Hadron-Hadron Scattering

KW - Jets

UR - http://www.scopus.com/inward/record.url?scp=85195199881&partnerID=8YFLogxK

U2 - 10.1007/JHEP03(2024)092

DO - 10.1007/JHEP03(2024)092

M3 - Article

AN - SCOPUS:85195199881

SN - 1126-6708

VL - 2024

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 3

M1 - 92

ER -

Multiplicity and event-scale dependent flow and jet fragmentation in pp collisions at √s = 13 TeV and in p–Pb collisions at √sNN = 5.02 TeV

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Bibliographical note

Funding

Keywords

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