Neutrinoless double beta decay search in XENON1T and XENONnT

Abstract

With the lowest background level ever reached by detectors searching for rare-events, XENON1T proved to be the most sensitive dark matter direct detection experiment on earth. The unprecedented low level of radioactivity reached, made the XENON1T experiment suitable also for other interesting rare-events searches including the neutrinoless double beta decay of 136Xe. In this proceeding, I will report on the current status of neutrinoless double beta decay of 136Xe search in XENON1T. Furthermore, in the context of the advancement of the XENON program, the next generation experiment, XENONnT, designed with a high level of background reduction aiming to increase the predecessor sensitivity in rare-events searches is currently under commissioning phase in the underground National Laboratory of Gran Sasso (LNGS): it hosts 5.9 tonnes of liquid xenon as a target mass. I will also discuss the ongoing sensitivity projection studies for neutrinoless double beta decay search in XENONnT.