$��$-like quartetting in the excited states of proton-neutron pairing Hamiltonians
| Autor: | M. Sambataro, N. Sandulescu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Nuclear and High Energy Physics Nuclear Theory Isovector Proton 010308 nuclear & particles physics QC1-999 FOS: Physical sciences 01 natural sciences Nuclear physics Nuclear Theory (nucl-th) Pairing Excited state 0103 physical sciences Neutron 010306 general physics Nucleon Ground state Nuclear Experiment Nuclear theory |
| Zdroj: | Physics Letters B, Vol 820, Iss, Pp 136476-(2021) Physics Letters |
| DOI: | 10.48550/arxiv.2105.08136 |
| Popis: | Previous studies have shown that the ground state of systems of nucleons composed by an equal number of protons and neutrons interacting via proton-neutron pairing forces can be described accurately by a condensate of $\alpha$-like quartets. Here we extend these studies to the low-lowing excited states of these systems and show that these states can be accurately described by breaking a quartet from the ground state condensate and replacing it with an "excited" quartet. This approach, which is analogous to the one-broken-pair approximation employed for like-particle pairing, is analysed for various isovector and isovector-isoscalar pairing Comment: 14 pages, 4 figures |
| Databáze: | OpenAIRE |
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