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Neutron-proton pairing in the BCS approach

Civitarese, O. and Reboiro, M. and Vogel, P. (1997) Neutron-proton pairing in the BCS approach. Physical Review C, 56 (4). pp. 1840-1843. ISSN 0556-2813. doi:10.1103/PhysRevC.56.1840.

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We investigate the BCS treatment of neutron-proton pairing involving time-reversed orbits. We conclude that an isospin-symmetric Hamiltonian, treated with the help of the generalized Bogolyubov transformation, fails to describe the ground state pairing properties correctly. In order for the np isovector pairs to coexist with the like-particle pairs, one has to break the isospin symmetry of the Hamiltonian by artificially increasing the strength of the np pairing interaction above its isospin-symmetric value. We briefly discuss the prescription how to choose the coupling constant of this auxiliary isospin-breaking pairing force.

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Vogel, P.0000-0003-0587-5466
Additional Information:©1997 The American Physical Society. Received 21 February 1997. O.C. and M.R. acknowledge support from the CONICET, Argentina. O.C. acknowledges a grant of the J.S. Guggenheim Memorial Foundation and thanks Caltech for hospitality. The work of P.V. was supported in part by the U.S. Department of Energy under Grant No. DE-FG03-88ER-40397.
Subject Keywords:DOUBLE-BETA DECAY
Issue or Number:4
Record Number:CaltechAUTHORS:CIVprc97
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5946
Deposited By: Tony Diaz
Deposited On:09 Nov 2006
Last Modified:08 Nov 2021 20:30

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