https://doi.org/10.1051/epjconf/202225913003
Study of Charge Symmetry Breaking in A = 4 hypernuclei in √SNN = 3 GeV Au+Au collisions at RHIC
1 Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
* e-mail: shaoth21@outlook.com
Published online: 1 February 2022
In this paper, we present the measurement of the charge symmetry breaking in A = 4 hypernuclei in Au+Au collisions at √SNN = 3 GeV. The signal reconstruction and binding energy measurement of Λ4H and Λ4He, including corrections and systematic uncertainty evaluation, are discussed. Combined with the energy levels of excited states, our preliminary result of Λ binding energy difference for excited states is ΔBΛ(1+) = −190±130(stat.)±70(syst.) keV which shows a negative value and its magnitude is comparable to the result of ground states ΔBΛ(0+) = 130 ± 130(stat.) ± 70(syst.) keV. These results are compared with previous measurements and theoretical model calculations.
© The Authors, published by EDP Sciences, 2022
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