Abstract
Measurements of mass and Λ binding energy of Λ4H and Λ4He 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 Λ4H and Λ4He, 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 ΔBΛ4(1exc+)≈−ΔBΛ4(0g.s.+)<0 and present a new method for the study of CSB effect using relativistic heavy-ion collisions.
Original language | English |
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Article number | 137449 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 834 |
DOIs | |
State | Published - Nov 10 2022 |
Bibliographical note
Publisher Copyright:© 2022 The Author(s)
Funding
We thank the RHIC Operations Group and RCF at BNL , the NERSC Center at LBNL , and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science , the U.S. National Science Foundation , National Natural Science Foundation of China , Chinese Academy of Science , the Ministry of Science and Technology of China and the Chinese Ministry of Education , the Higher Education Sprout Project by Ministry of Education at NCKU , the National Research Foundation of Korea , Czech Science Foundation and The Ministry of Education, Youth and Sports of the Czech Republic, Hungarian National Research, Development and Innovation Office , New National Excellency Programme of the Hungarian Ministry of Human Capacities , Department of Atomic Energy and Department of Science and Technology of the Government of India , the National Science Centre of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, German Bundesministerium f\u00FCr Bildung, Wissenschaft, Forschung und Technologie (BMBF), Helmholtz Association , Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS).
Funders | Funder number |
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Hungarian Ministry of Human Capacities | |
National Research Foundation of Korea | |
Max Delbrück Center for Molecular Medicine in the Helmholtz Association | |
Ministry of Education of the People's Republic of China | |
Narodowe Centrum Nauki | |
Grantová Agentura České Republiky | |
National Science Foundation Arctic Social Science Program | |
Raincoast Conservation Foundation | |
Bundesministerium für Bildung und Forschung | |
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal | |
Ministry of Education at NCKU | |
Ministry of Science and Technology of the People's Republic of China | |
Department of Atomic Energy and Department of Science and Technology | |
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie | |
Ministarstvo Obrazovanja, Znanosti i Sporta | |
Chinese Academy of Sciences | |
Office of Science Programs | |
Institute for Nuclear Physics | |
Ministerstvo Školství, Mládeže a Tělovýchovy | |
RHIC Operations Group | |
Ministry of Education, Culture, Sports, Science and Technology | |
National Natural Science Foundation of China (NSFC) | |
Japan Society for the Promotion of Science | 19H05598 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics