Abstract
The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity (| y| < 0.5) are measured in proton-proton collisions at s = 13 TeV as a function of the charged particle multiplicity, using the ALICE detector at the LHC. The production rates of KS0, Λ , Ξ , and Ω increase with the multiplicity faster than what is reported for inclusive charged particles. The increase is found to be more pronounced for hadrons with a larger strangeness content. Possible auto-correlations between the charged particles and the strange hadrons are evaluated by measuring the event-activity with charged particle multiplicity estimators covering different pseudorapidity regions. When comparing to lower energy results, the yields of strange hadrons are found to depend only on the mid-rapidity charged particle multiplicity. Several features of the data are reproduced qualitatively by general purpose QCD Monte Carlo models that take into account the effect of densely-packed QCD strings in high multiplicity collisions. However, none of the tested models reproduce the data quantitatively. This work corroborates and extends the ALICE findings on strangeness production in proton-proton collisions at 7 TeV.
Original language | English |
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Article number | 167 |
Journal | European Physical Journal C |
Volume | 80 |
Issue number | 2 |
DOIs | |
State | Published - Feb 1 2020 |
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 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), Universidade Federal do Rio Grande do Sul (UFRGS), Financiadora de Estudos e Projetos (Finep) and Funda\u00E7\u00E3o de Amparo \u00E0 Pesquisa do Estado de S\u00E3o Paulo (FAPESP), Brazil; Ministry of Science & Technology of China (MSTC), National Natural Science Foundation of China (NSFC) and Ministry of Education of China (MOEC) , China; Croatian Science Foundation and Ministry of Science and Education, 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 | Natural Sciences, the Carlsberg Foundation and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat \u00E0 l\u2019Energie Atomique (CEA), Institut National de Physique Nucl\u00E9aire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS) and R\u00E9gion des Pays de la Loire, 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; Indonesian Institute of Science, Indonesia; Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare (INFN), Italy; Institute for Innovative Science and Technology , Nagasaki Institute of Applied Science (IIST), Japan Society for the Promotion of Science (JSPS) KAKENHI and Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), 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 Science and Higher Education and National Science Centre, 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 and Ministry of Research and Innovation and Institute of Atomic Physics, Romania; Joint Institute for Nuclear Research (JINR), Ministry of Education and Science of the Russian Federation, National Research Centre Kurchatov Institute, Russian Science Foundation and Russian Foundation for Basic Research, Russia; 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; National Science and Technology Development Agency (NSDTA), Suranaree University of Technology (SUT) and Office of the Higher Education Commission under NRU project of Thailand, Thailand; Turkish Atomic Energy Agency (TAEK), 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.
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 | |
Department of Atomic Energy, Government of India | |
National Academy of Sciences of Ukraine | |
National Science and Technology Development Agency | |
National Research Foundation of Korea | |
Ministry of Education of the People's Republic of China | |
Narodowe Centrum Nauki | |
University Grants Commission | |
Institut National de Physique Nucléaire et de Physique des Particules | |
Institute of Atomic Physics, Romania | |
Conseil Régional des Pays de la Loire | |
General Secretariat for Research and Technology, Ministry of Education, Research and Religions | |
Institute for Innovative Science and Technology, Nagasaki Institute of Applied Science | |
Ministry of Education and Science | |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek | |
Institute of Atomic Physics and Ministry of Research and Innovation | |
Turkish Atomic Energy Agency | |
Korea Institute of Science and Technology Information | |
Knut och Alice Wallenbergs Stiftelse | |
Instituto Nazionale di Fisica Nucleare | |
Financiadora de Estudos e Projetos | |
Department of Science and Technology, Ministry of Science and Technology, India | |
Consejo Nacional de Ciencia y Tecnología | |
Helsinki Institute of Physics | |
Türkiye Atom Enerjisi Kurumu | |
Norges Forskningsråd | |
Yerevan Physics Institute | |
Natur og Univers, Det Frie Forskningsråd | |
Centre National de la Recherche Scientifique | |
Office of the Higher Education Commission | |
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 | |
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal | |
Russian Foundation for Basic Research | |
NRU | |
GSI Helmholtzzentrum für Schwerionenforschung | |
U.S. Department of Energy | |
Ministry of Education and Science of the Russian Federation | |
Carlsbergfondet | |
Indian Institute of Space Science and Technology | |
Fundação de Amparo à Pesquisa do Estado de São Paulo | |
National Nuclear Research Center | |
National Research Center "Kurchatov Institute" | |
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 | |
Russian Science Foundation | |
Lembaga Ilmu Pengetahuan Indonesia | |
Fondo de Cooperación Internacional en Ciencia y Tecnología | |
Universidade Federal do Rio Grande do Sul | |
Österreichischen Akademie der Wissenschaften | |
Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare | |
University Grants Commission, Government of India | |
National Research Foundation | |
Ministerstwo Edukacji i Nauki | |
Ministry of Higher Education and Scientific Research | |
CERN | |
Joint Institute for Nuclear Research | |
Nuclear Physics | |
Vetenskapsrådet | |
Hrvatska Zaklada za Znanost | |
Österreichische Nationalstiftung für Forschung, Technologie und Entwicklung | |
Ministry of Education, Culture, Sports, Science and Technology | |
National Natural Science Foundation of China | |
Austrian Science Fund | M 2467-N36 |
Austrian Science Fund | |
Japan Society for the Promotion of Science | 19K03887 |
Japan Society for the Promotion of Science | |
Science and Technology Facilities Council | GRIDPP |
Science and Technology Facilities Council | |
National Science Foundation | 1719759 |
National Science Foundation |