Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC
ALICE Collaboration (2019). Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC. Physics Letters B, 797, 134822. DOI: 10.1016/j.physletb.2019.134822
Published inPhysics Letters B
DisciplineFysiikkaYdin- ja kiihdytinfysiikan huippuyksikköPhysicsCenter of Excellence in Nuclear and Accelerator Based Physics
© 2019 The Authors. Published by Elsevier B.V. T
This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in (Figure presented.) collisions at s=13 TeV and p–Pb collisions at sNN=5.02 TeV, combined with previously published results from (Figure presented.) collisions at s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0 −1 and the effective range d0, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the Λ–Λ interaction. The region in the (f0 −1,d0) plane which would accommodate a Λ–Λ bound state is substantially restricted compared to previous studies. The binding energy of the possible Λ–Λ bound state is estimated within an effective-range expansion approach and is found to be BΛΛ=3.2−2.4 +1.6(stat)−1.0 +1.8(syst) MeV. ...
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Additional information about fundingNational Academy of Sciences of Ukraine Nederlandse Organisatie voor Wetenschappelijk Onderzoek Institut National de Physique Nucléaire et de Physique des Particules Ministry of Science,Technology and Research Bangladesh Council of Scientific and Industrial Research Ministry of Science and Technology of the People's Republic of China Science and Technology Research Partnership for Sustainable Development CERN Austrian Science Fund Bundesministerium für Bildung und Forschung Commissariat à l'Énergie Atomique et aux Énergies Alternatives Ministry of Higher Education and Scientific Research Consejo Nacional de Ciencia y Tecnología, Paraguay Knut och Alice Wallenbergs Stiftelse Office of the Higher Education Commission Department of Science and Technology, Government of Kerala Ministry of Education and Science of the Russian Federation Science and Technology Facilities Council Suranaree University of Technology Istituto Nazionale di Fisica Nucleare General Secretariat for Research and Technology Japan Society for the Promotion of Science Ministry of Science and Technology, Croatia United States-Israel Binational Science Foundation Conseil Régional des Pays de la Loire Joint Institute for Nuclear Research Österreichische Nationalstiftung für Forschung, Technologie und Entwicklung Türkiye Atom Enerjisi Kurumu National Sleep Foundation Universidade Federal do Rio Grande do Sul Korea Institute of Science and Technology Information Ministry of Education, Culture, Sports, Science and Technology Austrian Science Fund National Kidney Foundation of South Africa Danish Eye Research Foundation Centre National de la Recherche Scientifique Vetenskapsrådet National Science and Technology Development Agency National Natural Science Foundation of China Institute for Critical Technology and Applied Science Fondo de Cooperación Internacional en Ciencia y Tecnología Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México Istituto Nazionale di Fisica Nucleare Conselho Nacional de Desenvolvimento Científico e Tecnológico University Grants Commission - Sri Lanka Department of Science and Technology, Ministry of Science and Technology Fundação de Amparo à Pesquisa do Estado de São Paulo See opportunities by FAPESP Conselho Nacional de Desenvolvimento Científico e Tecnológico Lembaga Ilmu Pengetahuan Indonesia Institut National de Physique Nucléaire et de Physique des Particules Department of Atomic Energy, Government of India Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard University Consejo Nacional de Ciencia y Tecnología Financiadora de Estudos e Projetos Ministry of Education of the People's Republic of China International Atomic Energy Agency Österreichischen Akademie der Wissenschaften GSI Helmholtzzentrum für Schwerionenforschung GmbH Ministry of Education, Culture, Sports, Science and Technology Ministry of Education and Science National Natural Science Foundation of China ...
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