Resonances of A = 4T = 1 isospin triplet states within the ab initio no-core Gamow shell model

Li, J. G.; Michel, N.; Zuo, W.; Xu, F. R.

doi:10.1103/physrevc.104.024319

Title: Resonances of A = 4T = 1 isospin triplet states within the ab initio no-core Gamow shell model

Journal Article · Thu Aug 12 00:00:00 EDT 2021 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.104.024319· OSTI ID:1851244

Li, J. G. ^[1];

^[2]; Zuo, W. ^[2];

^[1]

Peking Univ., Beijing (China)
Chinese Academy of Sciences (CAS), Lanzhou (China); Univ. of Chinese Academy of Sciences, Beijing (China)

Here, the A = 4 nuclei, i.e., ⁴H, ⁴He, and ⁴Li , establish an interesting isospin T = 1 isobaric system. ⁴H and ⁴Li are unbound broad resonances, whereas ⁴He is deeply bound in its ground state but unbound in all its excited states. The present situation is that experiments so far have not given consistent data on the resonances. Few-body calculations have well studied the scatterings of the 4N systems. In the present work, we provide many-body calculations of the broad resonance structures, in an ab initio framework with modern realistic interactions. It occurs that, indeed, ⁴H, ⁴Li, and excited ⁴He are broad resonances, which is in accordance with experimental observations. The calculations also show that the first 1^- excited state almost degenerates with the 2^- ground state in the pair of mirror isobars of ⁴H and ⁴Li, which may suggest that the experimental data on energy and width are the mixture of the ground state and the first excited state. The T = 1 isospin triplet formed with an excited state of ⁴He and ground states of ⁴H and ⁴Li is studied, focusing on the effect of isospin symmetry breaking.

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Research Organization:: Texas A & M Univ., Commerce, TX (United States); Peking Univ., Beijing (China)

Sponsoring Organization:: USDOE Office of Science (SC); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Peking Univ.; Chinese Academy of Sciences

Grant/Contract Number:: SC0009971; 2018YFA0404401; 11835001; 11921006; 12035001; 11975282; NPT2020ZZ01; NPT2020KFY13; XDPB15

OSTI ID:: 1851244

Journal Information:: Physical Review. C, Vol. 104, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Resonances of A = 4T = 1 isospin triplet states within the ab initio no-core Gamow shell model

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