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

Physics

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Abstract

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.

Original language	English (US)
Article number	137449
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	834
DOIs	https://doi.org/10.1016/j.physletb.2022.137449
State	Published - Nov 10 2022

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/j.physletb.2022.137449

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@article{34d93618cae1470487e17c0eee309dd8,

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 = "{STAR Collaboration} and Abdallah, {M. S.} and Aboona, {B. E.} and J. Adam and L. Adamczyk and Adams, {J. R.} and Adkins, {J. K.} and I. Aggarwal and Aggarwal, {M. M.} and Z. Ahammed and Anderson, {D. M.} and Aschenauer, {E. C.} and Ashraf, {M. U.} and J. Atchison and V. Bairathi and W. Baker and {Ball Cap}, {J. G.} and K. Barish and A. Behera and R. Bellwied and P. Bhagat and A. Bhasin and J. Bielcik and J. Bielcikova and Brandenburg, {J. D.} and Cai, {X. Z.} and H. Caines and {Calder{\'o}n de la Barca S{\'a}nchez}, M. and D. Cebra and I. Chakaberia and P. Chaloupka and Chan, {B. K.} and Z. Chang and A. Chatterjee and S. Chattopadhyay and D. Chen and J. Chen and Chen, {J. H.} and X. Chen and Z. Chen and J. Cheng and S. Choudhury and W. Christie and X. Chu and Crawford, {H. J.} and M. Csan{\'a}d and M. Daugherity and Deppner, {I. M.} and A. Dhamija and {Di Carlo}, L. and S. Heppelmann",

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

year = "2022",

month = nov,

day = "10",

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

language = "English (US)",

volume = "834",

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

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

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

AU - STAR Collaboration

AU - Abdallah, M. S.

AU - Aboona, B. E.

AU - Adam, J.

AU - Adamczyk, L.

AU - Adams, J. R.

AU - Adkins, J. K.

AU - Aggarwal, I.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Anderson, D. M.

AU - Aschenauer, E. C.

AU - Ashraf, M. U.

AU - Atchison, J.

AU - Bairathi, V.

AU - Baker, W.

AU - Ball Cap, J. G.

AU - Barish, K.

AU - Behera, A.

AU - Bellwied, R.

AU - Bhagat, P.

AU - Bhasin, A.

AU - Bielcik, J.

AU - Bielcikova, J.

AU - Brandenburg, J. D.

AU - Cai, X. Z.

AU - Caines, H.

AU - Calderón de la Barca Sánchez, M.

AU - Cebra, D.

AU - Chakaberia, I.

AU - Chaloupka, P.

AU - Chan, B. K.

AU - Chang, Z.

AU - Chatterjee, A.

AU - Chattopadhyay, S.

AU - Chen, D.

AU - Chen, J.

AU - Chen, J. H.

AU - Chen, X.

AU - Chen, Z.

AU - Cheng, J.

AU - Choudhury, S.

AU - Christie, W.

AU - Chu, X.

AU - Crawford, H. J.

AU - Csanád, M.

AU - Daugherity, M.

AU - Deppner, I. M.

AU - Dhamija, A.

AU - Di Carlo, L.

AU - Heppelmann, S.

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.

UR - http://www.scopus.com/inward/record.url?scp=85139207053&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85139207053&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2022.137449

DO - 10.1016/j.physletb.2022.137449

M3 - Article

AN - SCOPUS:85139207053

SN - 0370-2693

VL - 834

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

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

M1 - 137449

ER -

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

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