Speaker
Bijaya Sharma
(IBS CUP)
Description
The search for neutrinoless double electron capture (0ν2EC) is a powerful probe for lepton-number violation and the Majorana nature of neutrinos. We report on a search for the 0ν2EC decay of 40Ca using the AMoRE-I cryogenic detector array, which utilizes metallic magnetic calorimeters (MMCs) and 48depl.Ca100MoO4 crystals. Analyzing a total exposure of 7.32 kg·yr (1.39 kg·yr of 40Ca), we find no evidence of a signal and set a lower half-life limit of T0ν1/2 > 1.7 × 1022 yr at 90% C.L. Furthermore, we project a sensitivity of 9.1 × 1022 yr for the upcoming AMoRE-II phase. These results highlight the versatility of the AMoRE detector technology in investigating rare decay processes beyond its primary 0νββ search program.
Primary author
Bijaya Sharma
(IBS CUP)
