CALDER - Neutrinoless double-beta decay identification in TeO2 bolometers with kinetic inductance detectors

[摘要] Next-generation experiments searching for neutrinoless double-beta decay must be sensitive to a Majorana neutrino mass as low as 10 meV. CUORE, an array of 988 TeO2bolometers being commissioned at Laboratori Nazionali del Gran Sasso in Italy, features an expected sensitivity of 50-130 meV at 90% C.L, that can be improved by removing the background from α radioactivity. This is possible if, in coincidence with the heat release in a bolometer, the Cherenkov light emitted by the β signal is detected. The amount of light detected is so far limited to only 100 eV, requiring low-noise cryogenic light detectors. The CALDER project (Cryogenic wide-Area Light Detectors with Excellent Resolution) aims at developing a small prototype experiment consisting of TeO2bolometers coupled to new light detectors based on kinetic inductance detectors. The present R&D is focused on the light detectors. We present the latest results and the perspectives of the project.

[发布机构] INFN - Sezione di Roma, Piazzale Aldo Moro 2, Roma; 06585, Italy^1;Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 2, Roma; 06585, Italy^2;Physics Department, Princeton University, Washington Road, Princeton; NJ; 08544, United States^3;Istituto di Fotonica e Nanotecnologie - CNR, Via Cineto Romano 42, Roma; 06556, Italy^4;INFN - Laboratori Nazionali Del Gran Sasso, Via G. Acitelli, 22, Assergi (AQ); 67100, Italy^5;Dipartimento di Fisica, Università degli Studi di Genova, Via Dodecaneso 33, Genova; 16146, Italy^6;INFN - Sezione di Genova, Via Dodecaneso 33, Genova; 16146, Italy^7

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Alpha radioactivity;Cherenkov light;Cryogenic light detectors;Generation experiments;Kinetic inductance detectors;Majorana neutrino mass;Neutrinoless double-beta decays;Prototype experiment