First Results from the AMoRE-Pilot neutrinoless double beta decay experiment

• Published in: arXiv.org
• Main Authors: Alenkov, V, Bae, H W, Beyer, J, Boonin, K, Buzanov, O, Chanthima, N, Cheoun, M K, Chernyak, D M, Choe, J S, Choi, S, Danevich, F A, Djamal, M, Enss, C, Fleischmann, A, Gangapshev, A M, Gavriljuk, Yu M, Gezhaev, A M, Grigoryeva, V D, Gylova, O, C Ha, Ha, D H, Ha, E J, Hahn, I S, Jang, C H, Jeon, E J, Jeon, J A, Jo, H S, Kaewkhao, J, Kang, S J, Kang, W G, Kazalov, V V, Khan, A, Khan, S, Kim, D Y, Kim, G W, Kim, H B, Kim, H J, Kim, H S, Kim, I, Kim, S C, Kim, S G, Kim, S K, Kim, S R, Kim, W T, Kim, Y D, Kim, Y H, Kirdsiri, K, Ko, Y J, Kobychev, V V, Kornoukhov, V, Kuzminov, V V, Kwon, D H, Lee, C, Lee, E K, Lee, H J, Lee, H S, Lee, J S, Lee, J Y, Lee, K B, Lee, M H, Lee, M K, Lee, S W, Lee, S H, Leonard, D, J Li, Y Li, Limkitjaroenporn, P, Makarov, E P, Oh, S Y, Oh, Y M, Olsen, S L, Pabitra, A, Panasenko, S I, Pandey, I, Park, C W, Park, H K, Park, H S, Park, K S, Park, S Y, Poda, D V, Polischuk, O G, Prihtiadi, H, Ra, S J, Ratkevich, S S, Rooh, G, Sari, M B, Seo, K M, Shin, J W, Shin, K A, Shlegel, V N, Siyeon, K, So, J H, Son, J K, Srisittipokakun, N, Sujita, K, Tretyak, V I, Wirawan, R, Woo, K R, Yoon, Y S, Yue, Q
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 08.05.2019
• Subjects: Beta decay; Calcium compounds; Molybdenum; Neutrinos; Physics - High Energy Physics - Experiment; Physics - Instrumentation and Detectors
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1903.09483

The Advanced Molybdenum-based Rare process Experiment (AMoRE) aims to search for neutrinoless double beta decay (0\(\nu\beta\beta\)) of \(^{100}\)Mo with \(\sim\)100 kg of \(^{100}\)Mo-enriched molybdenum embedded in cryogenic detectors with a dual heat and light readout. At the current, pilot stage of the AMoRE project we employ six calcium molybdate crystals with a total mass of 1.9 kg, produced from \(^{48}\)Ca-depleted calcium and \(^{100}\)Mo-enriched molybdenum (\(^{48\textrm{depl}}\)Ca\(^{100}\)MoO\(_4\)). The simultaneous detection of heat(phonon) and scintillation (photon) signals is realized with high resolution metallic magnetic calorimeter sensors that operate at milli-Kelvin temperatures. This stage of the project is carried out in the Yangyang underground laboratory at a depth of 700 m. We report first results from the AMoRE-Pilot \(0\nu\beta\beta\) search with a 111 kg\(\cdot\)d live exposure of \(^{48\textrm{depl}}\)Ca\(^{100}\)MoO\(_4\) crystals. No evidence for \(0\nu\beta\beta\) decay of \(^{100}\)Mo is found, and a upper limit is set for the half-life of 0\(\nu\beta\beta\) of \(^{100}\)Mo of \(T^{0\nu}_{1/2} > 9.5\times10^{22}\) y at 90% C.L.. This limit corresponds to an effective Majorana neutrino mass limit in the range \(\langle m_{\beta\beta}\rangle\le(1.2-2.1)\) eV.