$2\hat{I}½{\hat{I}}^2{\hat{I}}^2$ Spectrum in Chiral Effective Field Theory

Saad el Morabit, Ryan Bouabid, Vincenzo Cirigliano +3

We investigate two-neutrino double beta decay ($2\hat{I}½{\hat{I}}^2{\hat{I}}^2$) in chiral effective field theory. We find contributions from weak magnetism and double-weak pion-exchange at next-to-leadi…