Conveners
Experiment
- Lorenzo Pagnanini (Gran Sasso Science Institute & INFN - LNGS)
Experiment
- Léonard Imbert (IJClab / CNRS - Université Paris-Saclay)
Experiment
- Ivan Stekl (IEAP CTU in Prague)
Experiment
- Pia Loaiza (LAL)
Experiment
- Mark Shirchenko (Joint Institute for Nuclear Research)
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 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of...
In this talk, I will introduce the nEXO experiment, a proposed next-generation search for the neutrinoless double beta decay (0νβꞵ) of 136Xe with a projected half-life sensitivity of 1.35 x 1028 years, nearly two orders of magnitude beyond existing experiments. Building on techniques developed for the successful EXO-200 experiment, the primary detector will be a 5-tonne, monolithic liquid...
Among the potentially double-beta decay (DBD) active natural isotopes, $^{96}$Zr is promising because of its high energy transition ($Q_{2\beta}=3.35$ MeV) that helps to overcome issues with background events generated by environmental $\gamma$ radioactivity and internal $\beta$-active nuclides from U/Th decay chains. Moreover the $^{94}$Zr isotope has a lower Q$_{2\beta}$-value (1.14 MeV)...
A solid observation of neutrino-less double beta decay (0νDBD) relies on the possibility of operating high-energy resolution detectors with detailed background control. Scintillating cryogenic calorimeters are one of the most promising tools to fulfill the requirements for a next-generation experiment. CUPID-0 has been the first demonstrator of the proposed CUPID experiment based on this...
The MAJORANA DEMONSTRATOR recently concluded its search for neutrinoless double-beta decay. The experiment operated an array of up to 40.4 kg of germanium detectors, 27 kg of which were isotopically enriched in $^{76}$Ge and housed inside a compact shield consisting of lead and copper at the Sanford Underground Research Facility (SURF) in Lead, SD. The experiment achieved a world leading...
We describe the MONUMENT project (Muon Ordinary capture for NUclear Matrix elemENTs calculations) aims to determine ordinary muon capture (OMC) rates, which could help in studying nuclear responses for antineutrinos associated with double beta decays (ββ) and astroneutrino interactions.
The MONUMENT project has conducted a series of meticulous measurements at the PSI muon facility in...
Neutrinoless double-beta decay (0$\nu\beta\beta$) is a key process to address some of the major outstanding issues in particle physics, such as the lepton number conservation and the Majorana nature of the neutrino. Several efforts have taken place in the last decades in order to reach higher and higher sensitivity on its half-life. The next-generation of experiments aims at covering the...
In this presentation, we will report two new studies on the spectral shape: the $2\nu\beta\beta$ decay of the $^{100}$Mo in the CUPID-Mo experiment, and the $^{113}$Cd $\beta$ decay in the framework of the CROSS project. The CUPID-Mo experiment is a demonstrator for the next generation 0νββ experiment CUPID.
The experiment is an array of 20 enriched Li$_2$$^{100}$MoO$_4$ bolometers and 20 Ge...
An experiment to study double beta decay processes in $^{106}$Cd using a $^{106}$CdWO$_4$ crystal scintillator (mass 215 g) enriched in $^{106}$Cd at 66$\%$ is in progress at the Laboratori Nazionali del Gran Sasso (LNGS), in Italy. Events in the $^{106}$CdWO$_4$ detector are recorded in (anti)coincidences with two large-volume CdWO$_4$ scintillation counters. The design of the detector...
The AMoRE (Advanced Mo-based Rare process Experiment) aims to study the double beta decay of 100Mo in order to gain insights into neutrino masses using a cryogenic technique. The study of 2vββ decay from 100Mo to an excited state of 100Ru helps us understand nuclear matrix elements and nuclear models as well as search for the bosonic (symmetric) fraction of the neutrino wave function.
The...
BINGO is a prototype experiment to demonstrate a path towards a nearly background free tonne-scale cryogenic $0\nu\beta\beta$ experiment with O(10000) detectors with the isotopes $^{100}$Mo and $^{130}$Te. The major design aspects to achieve this goal are (1) a novel detector assembly reducing the exposed surface area of un-instrumented (passive) materials in the detector array by more than...
The ACCESS (Array of Cryogenic Calorimeters to Evaluate Spectral Shapes) project aims to establish a novel detector to perform a precise study of the spectral shape of forbidden β-decays. These strongly suppressed processes can help to clarify the long-standing issue of the axial coupling constant (gA) quenching. Moreover, such rare decays are also a common source of systematic uncertainty in...
The spectrum-shape method has been proposed to determine the effective value of weak coupling constants g$_V$ (vector part) and g$_A$ (axial-vector part) in forbidden β decays. The nuclear transition from $^{99}$Tc(9/2$^+$) to $^{99}$Ru(5/2 $^+$) is 2$\rm^{nd}$ non-unique forbidden β decay, the shape function strongly depends on the g$_A$ of variant nuclear-model frameworks. The maximum...
The nuclear matrix element for neutrinoless double beta decay of $^{76}$Ge can be expressed as a sum over all transitions along states of the intermediate nucleus $^{76}$As. The dominant contribution is expected to be the ground state of $^{76}$As. Experimentally the contribution of the $^{76}$As ground state can be investigated via the branching ratios of its $\beta^-$ and electron capture...
