Speaker
Dr
Sebastian Lindemann
(Universität Freiburg)
Description
Two-neutrino double electron capture (2νECEC) is a second-order weak-interaction process with a predicted half-life that surpasses the age of the Universe by many orders of magnitude. Here we report the direct observation of 2νECEC in Xe-124 with the XENON1T dark-matter detector. The significance of the signal is 4.4 standard deviations and the corresponding half-life of $1.8 \times 10^{22}$ years is the longest measured directly so far.
Primary author
Dr
Sebastian Lindemann
(Universität Freiburg)
