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Measurement of .sup.4./sup..sub.Λ./sub.H and .sup.4./sup..sub.Λ./sub.He binding energy in Au + Au collisions at √s.sub.NN./sub.= 3 GeV
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SYSNO ASEP 0566888 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Measurement of 4ΛH and 4ΛHe binding energy in Au + Au collisions at √sNN= 3 GeV Author(s) Abdallah, M. S. (EG)
Aboona, B. E. (US)
Adam, J. (US)
Adamczyk, L. (PL)
Bielčík, J. (CZ)
Bielčíková, Jana (UJF-V) RID, ORCID, SAI
Holub, L. (CZ)
Chaloupka, P. (CZ)
Kosarzewski, L. K. (CZ)
Kramárik, L. (CZ)
Líčeník, Robert (UJF-V) ORCID, SAI
Prozorova, V. (CZ)
Robotková, Monika (UJF-V) ORCID, SAI
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Truhlář, T. (CZ)
Trzeciak, B. A. (CZ)
Vaněk, J. (CZ)Number of authors 369 Article number 137449 Source Title Physics Letters. B. - : Elsevier - ISSN 0370-2693
Roč. 834, NOV (2022)Number of pages 8 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords STAR collaboration ; heavy ion collisions OECD category Nuclear physics R&D Projects LTT18002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018109 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 000898596700001 EID SCOPUS 85139207053 DOI 10.1016/j.physletb.2022.137449 Annotation Measurements of mass and Lambda binding energy of H-4(Lambda) and He-4(Lambda) in Au+Au collisions at root s(NN) = 3 GeV are presented, with an aim to address the charge symmetry breaking (CSB) problem in hypernuclei systems with atomic number A = 4. The Lambda binding energies are measured to be 2.22 +/- 0.06(stat.)+/- 0.14(syst.) MeV and 2.38 +/- 0.13(stat.)+/- 0.12(syst.) MeV for H-4(Lambda) and He-4(Lambda), respectively. The measured Lambda binding-energy difference is 0.16 +/- 0.14(stat.) +/- 0.10(syst.) MeV for ground states. Combined with the gamma-ray transition energies, the binding-energy difference for excited states is -0.16 +/- 0.14(stat.) f 0.10(syst.) MeV, which is negative and comparable to the value of the ground states within uncertainties. These new measurements on the Lambda binding-energy difference in A = 4 hypernuclei systems are consistent with the theoretical calculations that result in Lambda B-Lambda(4) (1(ex)(c)(+)) approximate to -Delta B-Lambda(4) (0(g.s)(+)) < 0 and present a new method for the study of CSB effect using relativistic heavy-ion collisions. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2023 Electronic address https://doi.org/10.1016/j.physletb.2022.137449
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