Measurement of HΛ4 and HeΛ4 binding energy in Au+Au collisions at sNN = 3 GeV

STAR Collaboration

doi:10.1016/j.physletb.2022.137449

Measurement of HΛ4 and HeΛ4 binding energy in Au+Au collisions at s_NN = 3 GeV

STAR Collaboration

Instituto de Alta Investigación

American University in Cairo
Texas A&M University
Brookhaven National Laboratory
AGH University of Krakow
Ohio State University
University of Kentucky
Panjab University
Variable Energy Cyclotron Centre
Central China Normal University
Abilene Christian University
Universidad de Tarapacá
University of California at Riverside
University of Houston
Stony Brook University
University of Jammu
Czech Technical University in Prague
Czech Academy of Sciences
Chinese Academy of Sciences
Yale University
University of California at Davis
Lawrence Berkeley National Laboratory
University of California at Los Angeles
Indiana University Bloomington
Warsaw University of Technology
Shandong University
Fudan University
University of Science and Technology of China
Tsinghua University
University of California at Berkeley
Eötvös Loránd University
Heidelberg University
Wayne State University
Indian Institute of Science Education and Research, Berhampur
Kent State University
Rice University
University of Tsukuba
University of Illinois at Chicago
Lehigh University
University of Calabria
National Cheng Kung University
Purdue University
Southern Connecticut State University
Technische Universität Darmstadt
Temple University
Valparaiso University
Indian Institute of Science Education and Research, Tirupati
CAS - Institute of Modern Physics
Goethe University Frankfurt
National Institute of Science Education and Research
University of Texas at Austin
Rutgers - The State University of New Jersey, New Brunswick
Institute of Nuclear Physics PAN
Max Planck Institute for Physics (Werner Heisenberg Institute)
Creighton University
Indian Institute of Technology Patna
Ball State University
Universidade de São Paulo
Huzhou University
Michigan State University
Argonne National Laboratory
United States Naval Academy
South China Normal University

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17 Citas (Scopus)

Resumen

Measurements of mass and Λ binding energy of _Λ⁴H and _Λ⁴He in Au+Au collisions at 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 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 ΔB_Λ⁴(1_exc⁺)≈−ΔB_Λ⁴(0_g.s.⁺)<0 and present a new method for the study of CSB effect using relativistic heavy-ion collisions.

Idioma original	Inglés
Número de artículo	137449
Publicación	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volumen	834
DOI	https://doi.org/10.1016/j.physletb.2022.137449
Estado	Publicada - 10 nov. 2022

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10.1016/j.physletb.2022.137449

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@article{b5fea95589d6466c86a50fb186a91bd4,

title = "Measurement of HΛ4 and HeΛ4 binding energy in Au+Au collisions at sNN = 3 GeV",

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.",

author = "Abdallah, \{M. S.\} and Aboona, \{B. E.\} and J. Adam and L. Adamczyk and S. Kabana and \{STAR Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s)",

year = "2022",

month = nov,

day = "10",

doi = "10.1016/j.physletb.2022.137449",

language = "English",

volume = "834",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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TY - JOUR

T1 - Measurement of HΛ4 and HeΛ4 binding energy in Au+Au collisions at sNN = 3 GeV

AU - Abdallah, M. S.

AU - Aboona, B. E.

AU - Adam, J.

AU - Adamczyk, L.

AU - Kabana, S.

AU - STAR Collaboration

PY - 2022/11/10

Y1 - 2022/11/10

N2 - 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.

AB - 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.

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DO - 10.1016/j.physletb.2022.137449

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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