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

0566888 - ÚJF 2023 RIV NL eng J - Článek v odborném periodiku
Abdallah, M. S. - Aboona, B. E. - Adam, J. - Adamczyk, L. - Bielčík, J. - Bielčíková, Jana - Holub, L. - Chaloupka, P. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Prozorova, V. - Robotková, Monika - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. - Vaněk, J. … celkem 369 autorů
Measurement of ⁴_ΛH and ⁴_ΛHe binding energy in Au + Au collisions at √s_NN= 3 GeV.
Physics Letters. B. Roč. 834, NOV (2022), č. článku 137449. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LTT18002; GA MŠMT LM2018109
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * heavy ion collisions
Obor OECD: Nuclear physics
Impakt faktor: 4.3, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1016/j.physletb.2022.137449

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.
Trvalý link: https://hdl.handle.net/11104/0338158


Vědecká data: HEPData, HEPData, HEPData