6533b831fe1ef96bd1299934
RESEARCH PRODUCT
Value of the Axial-Vector Coupling Strength in β and ββ Decays : A Review
Jouni Suhonensubject
Semileptonic decayParticle physicsaxial-vector coupling strengthMaterials Science (miscellaneous)Biophysicsforbidden beta decaysGeneral Physics and Astronomy01 natural sciencesbeta spectra0103 physical sciencesPhysical and Theoretical Chemistry010306 general physicsPseudovectorMathematical PhysicsPhysicsQuenchingCoupling constantdouble beta decaysCoupling strength010308 nuclear & particles physicsmuon captureNuclear matterlcsh:QC1-999Muon capturecharge-exchange reactionsGamow-Teller beta decaysValue (mathematics)lcsh:Physicsstrength functionsdescription
In this review the quenching of the weak axial-vector coupling constant, $g_{\rm A}$, is discussed in nuclear $\beta$ and double-$\beta$ decays. On one hand, the nuclear-medium and nuclear many-body effects are separated, and on the other hand the quenching is discussed from the points of view of different many-body methods and different $\beta$-decay and double-$\beta$-decay processes. Both the historical background and the present status are reviewed and contrasted against each other. The theoretical considerations are tied to performed and planned measurements, and possible new measurements are urged, whenever relevant and doable. Relation of the quenching problem to the measurements of charge-exchange reactions and muon-capture rates is pointed out.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-11-01 |