Spontaneous symmetry breaking and the energy of nuclear isobaric analog states
The asymmetry between proton and neutron numbers in a nucleus is viewed as a consequence of the spontaneous symmetry breaking of the isospin symmetry. The signatures of this effect, as it was suggested by Danchev, Khanna, and Umezawa and co-workers, may have been seen already in the energetics of th...
Guardado en:
| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/160193 |
| Aporte de: |
| Sumario: | The asymmetry between proton and neutron numbers in a nucleus is viewed as a consequence of the spontaneous symmetry breaking of the isospin symmetry. The signatures of this effect, as it was suggested by Danchev, Khanna, and Umezawa and co-workers, may have been seen already in the energetics of the nuclear isobaric analog resonance state and in the systematic of double-odd double-even mass differences. In order to account for finite size effects, not included in Umezawa’s approach, we have calculated the mean field term of the Hamiltonian in a realistic nuclear single-particle basis. The nonvanishing value of the I₃ current in the nonperturbative vacuum is explained in terms of ρ meson exchange. |
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