Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Status of the search for ${}^{48}$ Ca double beta decay with CANDLES

Jul 8, 2022, 7:05 PM
1h 25m
Bologna, Italy

Bologna, Italy

Palazzo della Cultura e dei Congressi
Poster Neutrino Physics Poster Session


Dr Yuto Minami (Research Center for Nuclear Physics, Osaka University)


The origin of neutrino masses remains shrouded in mystery. One of the possible scenarios is that neutrinos have Majorana masses, which leads to neutrinoless double-beta decay ($0\nu\beta\beta$). CANDLES is a project to search for the $0\nu\beta\beta$ events from ${}^{48}\mathrm{Ca}$, which has a relatively high Q$_{\beta\beta}$-value of $4.27\,$MeV among the known double beta decay nuclei. We developed a CANDLES-III system with 96 $\mathrm{CaF}_2$ scintillation crystals with natural Ca isotope, which corresponds to $350\,$g of ${}^{48}\mathrm{Ca}$, and took data with about $652$ days of observation from $2016$. We are preparing a method to reduce $\beta$-decay background events to increase the sensitivity to the signal.
In this talk, a development of the method for background reduction and the latest status of the search for the $0\nu\beta\beta$ will be reported.

In-person participation No

Primary author

Dr Yuto Minami (Research Center for Nuclear Physics, Osaka University)

Presentation materials