Speaker
Description
Neutrinoless double-beta decay (0νββ) is a key process in addressing some of the most significant open questions in particle physics, namely the conservation of lepton number and the Majorana nature of the neutrino. Over the past decades, extensive efforts have been dedicated to improving the sensitivity of 0νββ half-life measurements across multiple isotopes. The next generation of experiments aims to probe half-lives greater than 10²⁷ years, reaching the sensitivity required to explore the Inverted-Ordering region of the neutrino mass spectrum.
Among the various techniques employed, low-temperature calorimetry has proven exceptionally promising and is expected to maintain a leading role in future searches, particularly through the CUPID experiment. CUPID (CUORE Upgrade with Particle IDentification) will search for the 0νββ decay of ¹⁰⁰Mo, leveraging the existing cryogenic infrastructure and expertise gained from CUORE, the first tonne-scale low-temperature calorimeter array, currently operating at the Laboratori Nazionali del Gran Sasso in Italy.
CUPID will utilize scintillating Li₂MoO₄ crystals enriched in ¹⁰⁰Mo, coupled with light detectors featuring Neganov-Trofimov-Luke amplification. With a total isotope mass of 240 kg, CUPID is designed to achieve a background index of 10⁻⁴ counts/keV/kg/year and a FWHM energy resolution of 5 keV. This performance will allow for a 3σ discovery sensitivity of 1.0 × 10²⁷ years after 10 live-years of data-taking, corresponding to an effective Majorana neutrino mass sensitivity in the range of 12–21 meV.
In this talk, we will present the current status of the CUPID experiment and outline the upcoming steps toward its construction.
| Collaboration you are representing | CUPID |
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