Comment on the statistical analysis in "A new experimental limit for the stability of the electron" by H.V. Klapdor-Kleingrothaus, I.V. Krivosheina and I.V. Titkova

Abstract

We point out the evident errors in statistical analysis of the data, performed by Klapdor-Kleingrothaus et al in recently published paper to establish a limit on the stability of electron with respect to the decay into $\nu+\gamma$. We performed the reestimation of the sensitivity of the experimental setups to the 256 keV gamma emitted in the hypothetical electron decay, and show that in [1] the limits on the electron stability and charge nonconservation parameter $\epsilon_{e\nu\gamma}^{2}$ are overestimated by at least a factor of 5. We have revealed evident errors in the statistical analysis, performed by Klapdor-Kleingrothaus et al in a recently published paper [1] to establish a limit on the stability of electron with respect to the decay into $\nu+\gamma$. The performed reestimation of the sensitivity of the experimental setups to the 256 keV gamma emitted in the hypothetical electron decay, has shown that the limits on the electron stability and charge nonconservation parameter $\epsilon_{e\nu\gamma}^{2}$ presented in [1], have been overestimated by at least a factor of 5.