Dynamics of Feshbach molecules in an ultracold three-component mixture

We present investigations of the formation rate and collisional stability of lithium Feshbach molecules in an ultracold three-component mixture composed of two resonantly interacting fermionic ${}^{6}$Li spin states and bosonic ${}^{174}$Yb. We observe long molecule lifetimes ($g100$ ms) even in the presence of a large ytterbium bath and extract reaction rate coefficients of the system. We find good collisional stability of the mixture in the unitary regime, opening new possibilities for studies and probes of strongly interacting quantum gases in contact with a bath species.