Charge exchange operators sum rules and proton-neutron T=0 and T=1 pairing interactions

E. Moya de Guerra; A. A. Raduta; L. Zamick; P. Sarriguren

doi:10.1016/j.nuclphysa.2003.07.009

paper

Charge exchange operators sum rules and proton-neutron T=0 and T=1 pairing interactions

arXiv:nucl-th/0304024 · doi:10.1016/j.nuclphysa.2003.07.009

Abstract

We study sum rules for charge exchange operators of the Gamow-Teller and Fermi type and explore what can be learned from them about proton-neutron pairing in T=0 and T=1 channels. We consider both energy weighted (EWSR) and non-energy weighted (NEWSR) sum rules. We use a schematic Hamiltonian to stress the distinctive roles of T=1 and T=0 pair interactions and correlations in the sum rules. Numerical results for 44Ti are presented for both schematic and realistic interactions.

17 pages, new section added. To appear in Nucl. Phys. A