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Physik-Institut Group of Laura Baudis

Probing Majorana neutrinos with double-β decay

The latest results from the GERDA experiment were published in Science this week. GERDA reached the 1.1 x 1026 y sensitivity to the half-life of the neutrinoless double beta decay of 76-Ge.

Combined with other experimental results ussing 76-Ge detectors, the sensitivity to the effective Majorana neutrino mass is 0.07 - 0.16 eV. The leading performance of GERDA in terms of background suppression, energy resolution and sensitivity opens the way to LEGEND, a next-generation Ge experiment with sensitivity to half-lives of 1027 y. A first phase, with 200 kg 76Ge is under preparation at LNGS.:DOI: 10.1126/science.aav8613 and arXiv:1909.02726