期刊
PHYSICS LETTERS B
卷 802, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2020.135223
关键词
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资金
- Worldwide LHC Computing Grid (WLCG) collaboration
- 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]
- Nationalstiftung fur Forschung, Technologie und Entwicklung, Austria
- Ministry of Communications and High Technologies, National Nuclear Research Center
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Universidade Federal do Rio Grande do Sul (UFRGS)
- Financiadora de Estudos e Projetos (Finep)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), Brazil
- Ministry of Science AMP
- Technology of China (MSTC)
- National Natural Science Foundation of China (NSFC)
- Ministry of Education of China (MOEC), China
- Croatian Science Foundation
- Ministry of Science and Education, Croatia
- Centro de Aplicaciones Tecnologicas y Desarrollo Nuclear (CEADEN)
- Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic
- Danish Council for Independent Research -Natural Sciences
- Danish National Research Foundation (DNRF), Denmark
- Helsinki Institute of Physics (HIP), Finland
- Commissariat a l'Energie Atomique(CEA)
- Rlegion des Pays de la Loire, France
- Bundesministerium fur Bildung, Wissenschaft, Forschung und Technologie (BMBF)
- Department of Atomic Energy, Government of India(DAE), Department of Science and Technology, Government of India
- University Grants Commission, Government of India
- Council of Scientific and Industrial Research (CSIR), India
- Istituto Nazionale di Fisica Nucleare (INFN), Italy
- Japan Society for the Promotion of Science (JSPS) KAKENHI
- Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- Consejo Nacional de Ciencia (CONACYT)
- Direccion General de Asuntos del Personal Academico (DGAPA), Mexico
- Commission on Science and Technology for Sustainable Development in the South (COMSATS), Pakistan
- National Research Foundation of South Africa
- Swedish Research Council (VR)
- Knut AMP
- Alice Wallenberg Foundation (KAW), Sweden
- European Organization for Nuclear Research, Switzerland
- Suranaree University of Technology (SUT)
- Office of the Higher Education Commission
- Turkish Atomic Energy Agency (TAEK), Turkey
- United States Department of Energy
- STFC [ST/M00340X/1, ST/P005438/1, ST/M001598/1, ST/P004199/1, ST/L005670/1, ST/N00261X/1, 1963192, 1796881, ST/P004598/1, ST/M00158X/1, ALICE, ST/M001601/1, ST/P005047/1] Funding Source: UKRI
- Science and Technology Facilities Council [2017 STFC Nuclear Physics CG] Funding Source: researchfish
Two-particle correlation functions were measured for p (p) over bar, p (Lambda) over bar, (p) over bar Lambda, and Lambda(Lambda) over bar pairs in Pb-Pb collisions at root sNN = 2.76 TeV and root sNN = 5.02 TeV recorded by the ALICE detector. From a simultaneous fit to all obtained correlation functions, real and imaginary components of the scattering lengths, as well as the effective ranges, were extracted for combined p (Lambda) over bar and (p) over bar Lambda pairs and, for the first time, for Lambda(Lambda) over bar pairs. Effective averaged scattering parameters for heavier baryon-antibaryon pairs, not measured directly, are also provided. The results reveal similarly strong interaction between measured baryon-antibaryon pairs, suggesting that they all annihilate in the same manner at the same pair relative momentum k*. Moreover, the reported significant non-zero imaginary part and negative real part of the scattering length provide motivation for future baryon-antibaryon bound state searches. (C) 2020 The Author(s). Published by Elsevier B.V.
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