Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Invited Talks II

HK 22.1: Invited Talk

Tuesday, March 29, 2022, 11:00–11:30, HK-H1

Towards background-free measurements of double-beta decay events: a quest to increase the detection sensitivity of the neutrinoless double beta decay mode — •Samuel Ayet San Andres for the NEXT collaboration — Justus-Liebig-University Giessen

Neutrinoless double beta decay, whose discovery would reveal the Majorana nature of neutrinos, is an extremely rare decay mode consisting of two simultaneous beta decays in which two electrons and no neutrinos are emitted. The current experiments in the search of such decay mode are far from a background-free condition, and the level of background achieved plays a crucial role in the limits of the reportable half-life of this decay mode. A method that allows discarding all the events except the ones produced via double beta decay is the correlation of the events with the detection of the daughter nuclei of the decay, leaving only the two-neutrino double beta decay as the only background of the experiment. The different research lines within the NEXT collaboration in the pursuit of a background-free experiment in order to increase the half-life sensitivity for the neutrinoless double beta decay will be presented.