Competition of $beta$-delayed protons and $beta$-delayed $gamma$ rays in $^{56}$Zn and the exotic $beta$-delayed $gamma$-proton decay

Remarkable results have been published recently on the $beta$ decay of $^{56}$Zn. In particular, the rare and exotic $beta$-delayed $gamma$-proton emission has been detected for the first time in the $fp$ shell. Here we focus the discussion on this exotic decay mode and on the observed competition between $beta$-delayed protons and $beta$-delayed $gamma$ rays from the Isobaric Analogue State.