TY  - INPR
T1  - Measurement of ⁴ΛH and ⁴ΛHe binding energy in Au+Au collisions at √sNN = 3 GeV
T2  - arXiv
N2  - Measurements of mass and Λ binding energy of 4ΛH and 4ΛHe in Au+Au collisions at √sNN=3 GeV are presented, with an aim to address the charge symmetry breaking (CSB) problem in hypernuclei systems with atomic number A = 4. The Λ 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 4ΛH and 4ΛHe, respectively. The measured Λ binding-energy difference is 0.16±0.14(stat.)±0.10(syst.) MeV for ground states. Combined with the γ-ray transition energies, the binding-energy difference for excited states is −0.16±0.14(stat.)±0.10(syst.) MeV, which is negative and comparable to the value of the ground states within uncertainties. These new measurements on the Λ binding-energy difference in A = 4 hypernuclei systems are consistent with the theoretical calculations that result in ΔB4Λ(1+exc) ≈ −ΔB4Λ(0+g.s.)<0 and present a new method for the study of CSB effect using relativistic heavy-ion collisions.
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/84891
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-848919
UR  - https://arxiv.org/abs/2207.00778v1
IS  - 2207.00778v1
PB  - arXiv
ER  -