The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ decay that has successfully reached the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO$_2$ crystals arranged in a compact cylindrical structure of 19 towers. CUORE has been collecting data continuously at ~10 mK since 2017,...
The LEGEND experiment is designed to search for neutrinoless double beta decay using Ge-76 enriched high purity germanium detectors that are immersed in liquid argon. LEGEND-200 (L200), operating at LNGS in Italy, builds on the successes in background suppression and analysis techniques from the Majorana Demonstrator and GERDA experiments. L200’s first results are based on 61 kgyr of exposure...
A low-background experiment to study double-beta decay processes in $^{106}$Cd using a $^{106}$CdWO$_4$ crystal scintillator (mass 215.4 g) enriched in $^{106}$Cd to 66$\%$, has been performed at the National Laboratories of Gran Sasso (LNGS), in Italy. Events in the $^{106}$CdWO$_4$ detector are recorded in (anti)coincidence with two large-volume CdWO$_4$ scintillation counters. The setup,...
The Global Rare Anomalous Nuclear Decay Experiment (GRANDE) aims to push the frontiers of nuclear and particle physics by investigating rare nuclear decay processes. A key focus of GRANDE is the measurement of extremely rare nuclear transitions and the search for exotic dark matter particles, including axion-like particles, anapole dark matter, and dark photons in nuclear transitions. Based on...
Positron-emitting double beta decay modes are rare nuclear processes. Their detection is challenging due to extremely low decay probabilities, complex experimental signatures, and the low natural abundance of suitable isotopes. Studying these decays can offer valuable insights into nuclear structure and fundamental symmetries. The decay rate is influenced by nuclear matrix elements (NMEs) and...
One of the most puzzling open questions in physics is whether neutrinos are their own antiparticles - are they Majorana particles? Demonstrating this property would impact our understanding of the neutrino mass ordering and the matter-antimatter asymmetry in the Universe. The Large Enriched Germanium Experiment for Neutrinoless $\beta\beta$ Decay (LEGEND) aims to shed light on this puzzle by...
Neutrinoless double-beta decay (0νββ) is a key process addressing some of the most significant open questions in particle physics, 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...
The 3dSPARK (3D-Printed Scintillating Polymer Assembly for Rare Events at milliKelvin Temperature) project aims to develop a novel type of assembly for next-generation bolometric neutrinoless double beta decay experiments. A significant part of the background in bolometric experiments originates from contamination of the copper frames traditionally used in the assembly. By using a 3D-printed...
The LEGEND experiment has been designed to search for neutrinoless double-beta decay in Ge-76. Its discovery would have profound implications for neutrino physics and cosmology providing unambiguous evidence for the Majorana nature of neutrinos, lepton number non-conservation and the absolute neutrino mass scale. The LEGEND-1000 detector represents the ton-scale phase of the LEGEND program,...
The search for double beta decay of $^{150}$Nd to the excited levels of $^{150}$Sm was performed at the Gran Sasso underground laboratory of INFN (Italy) with a four-crystal HPGe gamma spectrometer over 5.845 yr by using a highly purified neodymium-containing sample. The two-neutrino double beta transition of $^{150}$Nd to the first 740.5 keV $0^+$ level of $^{150}$Sm was detected in both...
Gadolinium-160 ($^{160}$Gd) is a candidate for double beta decay with relatively high natural abundance (21.9%). However, its low Q-value (1.73 MeV) makes the observation of even the two-neutrino double beta decay (2$\nu$2$\beta$) extremely challenging. Previous experiments using a 2-inch Gd$_2$SiO$_5$ (GSO) scintillator couldn’t detect 2$\nu$2$\beta$ due to significant background from...
MONUMENT (Muon Ordinary capture for NUclear Matrix element) measures Ordinary Muon Capture (OMC) on isotopes relevant for the neutrinoless double beta (0nbb) decay searches. OMC is a powerful tool to study the $0\nu\beta\beta$-decay NMEs as it involves similar momentum transfer and allows to experimentally probe the intermediate virtual transitions involved in the decay. OMC on $^A_{Z+2}X$...
The 2nd isomeric state of 178Hf has high energy of 2.446 MeV and big half-life of 31 yr. Normally it decays spontaneously to the ground state of 178Hf by isomeric transition with emission of cascade of gamma quanta with energies up to ~600 keV. Possible interactions of 178m2Hf with some given inelastic Dark Matter (iDM) candidates could lead to emission of gammas with energies >1 MeV from the...
The RES-NOVA project detects cosmic neutrinos via coherent elastic neutrino-nucleus scattering (CEνNS) using archaeological Pb-containing PbWO4 cryogenic detectors. RES-NOVA plans to conduct a direct detection campaign while waiting for neutrinos of astrophysical origin. The natural abundance of Pb-207 offers sensitivity to spin-dependent dark matter interactions. Additionally, Effective Field...
The KIMS collaboration had reported that a lower limit on the Sn-124 half-life using an organotin-loaded liquid scintillation detector remained the best result. And recent results from other experiments calls that the next generation of neutrinoless double beta decay experiment requires a substantial quantity of target isotope in order to attain the enhanced sensitivity of 1E28 year....
PandaX-4T is a liquid xenon time projection chamber (TPC) that searches for dark matter particles and neutrinoless double beta decay of xenon isotopes. In this talk, I will present our latest work on the double beta decay half-life limit established by PadnaX-4T for Xe-136(-134), as well as the effort to utilize the spectral information of Xe-136 decay for NME and new physics analysis.
Large-scale experiments like LEGEND are searching for the neutrinoless double beta decay of $^{76}$Ge. The measurement of the half-life of this process would give access to the neutrino mass using the nuclear matrix element. This can be expressed as a sum over all transitions along states of the intermediate nucleus $^{76}$As. Experimentally the contribution of the $^{76}$As ground state can...
Despite significant research efforts, the precise measurements of certain radioactive decays remain elusive. In this study, we have measured the energy and decay time of Ac-228 isomers produced by the beta decay of Ra-228. This was achieved using a novel method where a Ra-228 radioactive source is deposited in a scintillator. Given the low energy (45.8 keV) Q value of Ra-228 beta decay and the...
The SuperNEMO Experiment has entered its physics data-taking phase as of April 2025, becoming the only operational double beta decay detector capable of full topological event reconstruction via the tracker-calorimeter design. This topology-driven approach provides powerful discrimination of signal and background, and is uniquely suited to explore a wide range of BSM scenarios. The detector,...
Modern bubble chambers offer a unique opportunity to probe the dark matter parameter space. These detectors use superheated fluids such as C₃F₈ to detect elastic scatters on target nuclei. Nuclear recoils that deposit energy above the detector’s thermodynamic threshold—set by its operating temperature and pressure—nucleate visible bubbles, which are recorded by high-speed cameras.
The PICO...
