Has been Neutrinoless Double Beta Decay of 130Te observed by the CUORE experiment?

TL;DR

The CUORE experiment searched for neutrinoless double beta decay of 130Te, found no evidence, and set a new lower limit on the decay half-life, challenging previous theoretical suggestions of a shifted decay signal.

Contribution

This paper reports the latest CUORE results, providing a more accurate search for neutrinoless double beta decay and clarifying previous conflicting theoretical and experimental claims.

Findings

No evidence of neutrinoless double beta decay was observed.

A new lower limit on the decay half-life was established as > 2.8×10^24 years.

The results contradict earlier claims of a shifted decay signal.

Abstract

A recent reconsideration of a theoretical process of a neutrinoless double beta decay points out that a signal of the decay should be shifted by a few keV from the Q-value for the 2{\ss}0{\nu}-decay. The conclusion was based on an analysis of the experimental data of the HEIDELBERG-MOSCOW experiment and a reconsideration of the Cuoricino data. Still the recent CUORE results contradicted the conclusions completely. No trace of a 2{\ss}0{\nu}-decay was found and only a limit T1/2 > 2.8*10^24 y was postulated. The problem was very serious and the CUORE results have deserved a more careful consideration.