Effective value of gA in β and ββ decays
Suhonen, J. (2018). Effective value of gA in β and ββ decays. In C. Agodi, & F. Cappuzzello (Eds.), CNNP2017 : Conference on Neutrino and Nuclear Physics (pp. 012056). Journal of Physics : Conference Series, 1056. IOP Publishing. doi:10.1088/1742-6596/1056/1/012056
Published inJournal of Physics : Conference Series
© 2018 the Author(s)
Effective value of the weak axial-vector coupling strength, g A , in nuclear β and ββ (double beta) decays is discussed. Both Gamow-Teller and first-forbidden β decays are included in the analyses. Quenching of g A in β and two-neutrino ββ decays is reviewed and impact of this quenching on neutrinoless ββ decays is addressed. New measurements of β spectra of first-forbidden non-unique β decays are encouraged, to learn about the mesonic enhancement of the weak axial charge in these decays.