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RESEARCH PRODUCT
Relativistic two-body processes in axial-charge transitions
A. O. GattoneG. BarenboimE. Izquierdosubject
PhysicsNuclear and High Energy PhysicsNuclear TheoryOperator (physics)Nuclear Theorychemistry.chemical_elementFOS: Physical sciencesFísicaCharge (physics)HartreeNuclear Theory (nucl-th)Matrix (mathematics)chemistryAtomic physicsTindescription
We study the contribution of two-body meson-exchange processes to axial charge transitions for nuclei in the lead, tin and oxygen regions. We conduct calculations in the Dirac-Hartree (the Walecka model) and the relativistic Hartree (where the full one-nucleon-loop effects are included) approximations. We present results indicating that one- and two-body processes enhance the matrix elements of the axial-charge operator by some (100+-20)% in all three regions studied. This agrees well with the fit of eighteen first-forbidden beta-decay transitions conducted by Warburton in the lead region. We also discuss some sensitivities present in the calculation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-04-07 |