Speaker
Description
The search for neutrinoless double beta decay (0νββ) is fundamental for investigating lepton-number violation, probing new physics beyond the Standard Model, and determining whether neutrinos are Majorana particles. CUORE, a cryogenic calorimetric experiment at LNGS, studies 0νββ in $^{130}$Te using 988 TeO₂ crystals, reaching a tonne-scale mass and operating below 15 mK. Since 2017, CUORE has accumulated close to 3.0 tonne-years of exposure, constraining 0νββ in $^{130}$Te and achieving one of the most precise two-neutrino double beta decay (2νββ) half-life measurements and a detailed background reconstruction across a broad energy range. The next generation of experiments aims to probe half-lives greater than $10^{27}$ years, reaching the sensitivity required to explore the Inverted-Ordering region of the neutrino mass spectrum. CUPID (CUORE Upgrade with Particle IDentification) will search for the 0νββ decay of $^{100}$Mo, leveraging the existing cryogenic infrastructure and expertise gained from CUORE. CUPID will utilize scintillating Li₂MoO₄ crystals enriched in $^{100}$Mo, 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 × 10$^{27}$ years after 10 years of life-time, corresponding to an effective Majorana neutrino mass sensitivity in the range of 12–21 meV. This work presents the latest CUORE results, recent findings from the CUPID demonstrator, and outlines the forthcoming milestones toward the realization of the CUPID experiment.