Search for $2\nu \beta \beta$ decay of ${}^{136}$Xe to the 0${}_1^{+}$ excited state of ${}^{136}$Ba with EXO-200

200 Collaboration, J. B. Albert, D. J. Auty +88

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of ${}^{136}$Xe to the ground state of ${}^{136}$Ba. We report here on a search fo…