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arXiv · 1812.03927

Symmetry restoration in the mean-field description of proton-neutron pairing

A. M. Romero·J. Dobaczewski·A. Pastore
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Abstract

We show that the symmetry-restored paired mean-field states (quasiparticle vacua) properly account for isoscalar versus isovector nuclear pairing properties. Full particle-number, spin, and isospin symmetries are restored in a simple SO(8) proton-neutron pairing model, and prospects to implement a similar approach in a realistic setting are delineated. Our results show that, provided all symmetries are restored, the pictures based on pair-condensate and quartet-condensate wave functions represent equivalent ways of looking at the physics of nuclear proton-neutron pairing.

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A. M. Romero, J. Dobaczewski, A. Pastore. 2019-06-21. Symmetry restoration in the mean-field description of proton-neutron pairing. https://doi.org/10.1016/j.physletb.2019.06.032

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