Quest for electron decay $e^{-}\to {\nu }_e\gamma$ with a liquid xenon scintillator

A new lifetime limit on the charge nonconserving (CNC) electron decay through the channel $e^{-}\to {\nu }_e\gamma$ has been established analyzing a 2257.7 kg day event sample collected by the $\simeq 6.5$ kg liquid xenon DAMA scintillator at the Gran Sasso National Laboratory of INFN. This limit is $\tau >2.0\mathrm{}\left(3.4\right)\mathrm{}\times {10}^{26}$ yr at 90% (68%) C.L., one order of magnitude higher than the current limit for that channel.