Abstract
We report on the measurement of the size of the particle-emitting source from two-baryon correlations with ALICE in high-multiplicity pp collisions at s=13 TeV. The source radius is studied with low relative momentum p–p, p‾–p‾, p–Λ, and p‾–Λ‾ pairs as a function of the pair transverse mass mT considering for the first time in a quantitative way the effect of strong resonance decays. After correcting for this effect, the radii extracted for pairs of different particle species agree. This indicates that protons, antiprotons, Λ s, and Λ‾ s originate from the same source. Within the measured mT range (1.1–2.2) GeV/c2the invariant radius of this common source varies between 1.3 and 0.85 fm. These results provide a precise reference for studies of the strong hadron–hadron interactions and for the investigation of collective properties in small colliding systems.
Original language | English |
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Article number | 135849 |
Journal | Physics Letters B |
Volume | 811 |
DOIs | |
State | Published - Dec 10 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), 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; 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 | Natural Sciences , the Villum Fonden and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat \u00E0 l'\u00C9nergie 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, India (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), 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 Science and Higher Education , 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 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 and Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research , Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSDTA) 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 | |
Villum Fonden and Danish National Research Foundation | |
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 | |
Department of Science and Technology, Government of Kerala | |
University Grants Commission | |
General Secretariat for Research and Technology , Ministry of Education, Research and Religions | |
Institut National de Physique Nucléaire et de Physique des Particules | |
Institute of Atomic Physics, Romania | |
General Secretariat for Research and Technology, Ministry of Education, Research and Religions | |
Institute for Innovative Science and Technology, Nagasaki Institute of Applied 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 | |
Ministry of Science and Education and Croatian Science Foundation | |
Instituto Nazionale di Fisica Nucleare | |
Ministry of Education, Youth and Sports of the Czech Republic , Czech Republic | |
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 | |
Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi and Istituto Nazionale di Fisica Nucleare | |
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 | |
Indian Institute of Space Science and Technology | |
Fundação de Amparo à Pesquisa do Estado de São Paulo | |
National Nuclear Research Center | |
WUT ID-UB | |
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 | |
University Grants Commission , Government of India | |
Fondo de Cooperación Internacional en Ciencia y Tecnología | |
Universidade Federal do Rio Grande do Sul | |
Österreichischen Akademie der Wissenschaften | |
Indonesian Institute of Science, Indonesia | |
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 | |
Indonesian Institute of Science , Indonesia | |
Vetenskapsrådet | |
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 |
Japan Society for the Promotion of Science | 20H00163 |
Science and Technology Facilities Council | GRIDPP |