-
Jouni Suhonen (University of Jyväskylä)6/23/25, 9:45 AM
Neutrinoless double beta decay (NDBD) involves virtual transitions through states of an intermediate nucleus. The wave functions of these states can be efficiently probed by the ordinary muon capture (OMC), a process where a nucleus captures a negative muon from the lowest atomic orbital. The OMC on the NDBD daughter populates the states of the intermediate nucleus of the NDBD, like in the...
Go to contribution page -
Daniel Castillo Garcia (University of Barcelona/ICCUB)6/23/25, 10:45 AM
The exploration of physics beyond the Standard Model in nuclear physics is closely tied to investigating rare electroweak transitions. The most promising process is neutrinoless double-beta decay ($0\nu\beta\beta$), a nuclear transition where two neutrons simultaneously convert into two protons with the emission of only two electrons. If observed, this second-order decay would prove that...
Go to contribution page -
Sabin Stoica (International Centre for Advanced Training and Research in Physics)6/23/25, 11:15 AM
The kinematic factors in beta and double-beta decays are essential for understanding the decay rates, energy distributions and angular correlations of the emitted leptons, and also represent a testing ground for various BSM effects. Thus, their accurate calculation is very needed as theoretical support for experiments. In my talk I’ll give a review of the present status of these calculations...
Go to contribution page -
Lukas Graf (Nikhef/Charles University)6/23/25, 11:45 AM
The discovery of lepton number violation would be a clear sign of physics beyond the Standard Model, with neutrinoless double beta decay (0νββ) as its most sensitive probe. Within the SMEFT framework, we show that one-loop effects can significantly strengthen tree-level bounds on new-physics scales for several dimension-7 operators across flavours. Using UV model examples, we illustrate the...
Go to contribution page -
Mattia Beretta (University and INFN of Milano Bicocca)6/23/25, 1:45 PM
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,...
Go to contribution page -
William Quinn (UCL)6/23/25, 2:15 PM
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...
Go to contribution page -
Alice Leoncini (Università di Roma Tor Vergata)6/23/25, 2:45 PM
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,...
Go to contribution page -
Hong Joo Kim (Kyungpook National University)6/23/25, 3:15 PM
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...
Go to contribution page -
Javier Menendez (University of Barcelona)6/24/25, 9:15 AM
The detection of neutrinoless double beta decay (0nbb) remains elusive in spite of the intense experimental efforts to observe it. Indeed, the estimated half-life of the decay depends on nuclear matrix elements (NMEs) which are highly uncertain. A promising avenue to gain insights on the 0nbb NMEs is to explore related second-order processes in the weak (two-neutrino double-beta decay) and...
Go to contribution page -
Vaisakh Plakkot (University of Amsterdam & Nikhef)6/24/25, 9:45 AM
The addition of two gauge singlet right-handed neutrinos to the Standard Model conveniently explains neutrino oscillations, while also potentially explaining the matter-antimatter asymmetry. The possible Majorana nature of neutrinos resulting from this modification can lead to observable signals in the form of neutrinoless double beta decay. Recent calculations show that the neutrinoless...
Go to contribution page -
Osvaldo Civitarese (Department of Physics, University of La Plata, Argentina)6/24/25, 10:45 AM
The proton-neutron quasiparticle random-phase approximation (QRPA) and the particle number projected QRPA(PQRPA) are used to study the ordinary muon capture (OMC) reaction. In the present work, we have applied both methods to calculate the OMC on the 0$^+$ ground state of $^{76}$Se and $^{136}$Ba and included a comparison with the results obtained in shell model calculations. The nuclei...
Go to contribution page -
Yilong Yang (Peking University)6/24/25, 11:15 AM
The nuclear matrix elements for neutrinoless double-beta decay play an important role in interpreting the experimental half-life limits, yet are hampered by large theoretical uncertainties. One crucial aspect of the uncertainties is the leading-order short-range decay operator identified by the nonrelativistic chiral effective field theory. This short-range operator is required to achieve...
Go to contribution page -
Latsamy Xayavong (Yonsei University)6/24/25, 11:45 AM
Nuclear matrix elements in double beta decay are crucial for probing the nature of neutrinos. These quantities can, in principle, be inferred from experimental observables through various nuclear reactions. Examples include double charge exchange reactions connecting an initial and a final state, as well as single charge exchange and two-nucleon transfer reactions, which involve multiple...
Go to contribution page -
Veronika Palusova (JGU Mainz)6/24/25, 1:45 PM
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...
Go to contribution page -
Aravind Remesan Sreekala (University of Zurich)6/24/25, 2:15 PM
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...
Go to contribution page -
Léonard Imbert (INFN Milano-Bicocca)6/24/25, 2:45 PM
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...
Go to contribution page -
Léonard Imbert (INFN Milano-Bicocca)6/24/25, 3:10 PM
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...
Go to contribution page -
Dominik Starý6/25/25, 9:15 AM
Double-beta decay provides a promising probe sensitive to physics beyond the Standard Model, especially due to its potential to uncover the Majorana nature of neutrinos. For interpreting data from current and next-generation double-beta decay experiments, including SuperNEMO – which will be capable of measuring not only energy spectra but also angular correlations of emitted electrons – it is...
Go to contribution page -
Jun Terasaki (Czech Technical University in Prague)6/25/25, 9:45 AM
We calculate the nuclear matrix elements of the neutrinoless and the two-neutrino double-β decays for 136Xe to 136Ba with the higher-order corrections for the transition operators in terms of perturbation interaction. This is a study of the effects that cannot be included in the initial and the final nuclear wave functions. The new terms are derived by an extension of the usual leading-order...
Go to contribution page -
Saad el Morabit (University of Amsterdam, Nikhef)6/25/25, 10:45 AM
Corrections to neutrinofull double beta decay observables typically focus on QED interactions or on refining the treatment of nuclear matrix elements. We introduce a new kind: chiral. These corrections involve "Yukawa-like" pion exchanges between the two decaying nuclei, as well as weak force magnetism. We explore how these effects alter decay rates and spectra, and whether they can mimic or...
Go to contribution page -
Vasile-Alin Sevestrean (FF-UB, CIFRA, IFIN-HH)6/25/25, 11:15 AM
In this presentation, we investigate the electron capture decay of 9797Tc to the 320 keV excited state of 9797Mo, exploring its potential application in neutrino mass determination. We calculate the decay half-life and the energy distribution released following the capture. Due to uncertainties in the angular momentum of the final state, we consider multiple possible transition types. By...
Go to contribution page -
Aagrah Agnihotri (University of Jyväskylä)6/25/25, 11:45 AM
The study of weak interaction nuclear processes in general, and nuclear β-decay in particular, plays a key role in multiple avenues of searches for physics beyond the standard model. The search for the rare neutrinoless double β-decay(0νββ) and exotic dark matter in nuclear laboratory-scale experiments are among such searches that aim to answer foundational questions in physics. In the...
Go to contribution page -
Grzegorz Zuzel (Jagiellonian University)6/25/25, 1:45 PM
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,...
Go to contribution page -
Fedir Danevych (INFN sez. Tor Vergata, Rome, Italy)6/25/25, 2:15 PM
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...
Go to contribution page -
Takumi Omori (University of Tsukuba)6/25/25, 2:45 PM
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...
Go to contribution page -
Ke Han (Shanghai Jiao Tong University)6/25/25, 3:15 PM
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.
Go to contribution page -
Chandan Hati (Instituto de Física Corpuscular (IFIC), CSIC-UV, Spain)6/26/25, 9:15 AM
Lepton number violating (LNV) interactions occur in the Standard Model Effective Field Theory (SMEFT) at odd dimensions starting from the dimension-5 Weinberg operator. The operators higher than dimension-5 are suppressed by additional powers of the heavy new scale. However, they can be crucial when traditional seesaw mechanisms leading to tree-level dimension-5 contributions are absent....
Go to contribution page -
Fabian Esser (Charles University Prague)6/26/25, 9:45 AM
The observation of lepton number violation (LNV) would be clear evidence for physics beyond the Standard Model. Famous examples for processes that violate lepton number by two units are neutrino mass mechanisms and neutrinoless double beta decay.
Go to contribution page
In the Standard Model Effective Field Theory (SMEFT), a ubiquitous framework used for indirect new physics searches, $\Delta L =2$ operators appear... -
Jan Miśkiewicz (Physics Faculty, University of Warsaw)6/26/25, 10:45 AM
Two-neutrino double beta decay (2νββ) is a second-order weak-interaction process. Consequently,it is among the rarest radioactive processes observed in nature.
The 2νββ decay has recently attracted significant attention due to substantial investments in the search for the yet unobserved neutrinoless double beta decay (0νββ), a process considered a potential gateway to new physics beyond...
Go to contribution page -
Petr Vesely (Nuclear Physics Institute, Czech Academy of Sciences)6/26/25, 11:15 AM
Double beta decay (DBD) is a phenomenon which provides us unique window to physics beyond Standard Model and which lies at the intersection of particle, nuclear and atomic physics. It is of crucial importance to distuinguish whether DBD occurs solely in two-neutrino or also neutrino-less variant. Possible discovery of neutrino-less or other exotic mode of DBD would have big consequences in...
Go to contribution page -
DongLiang Fang (Institute of Modern Physics, Chinese Academy of sciences)6/26/25, 11:45 AM
Left-right symmetric model (LRSM) offers rich phenomenon of particle physics. One of which is the neutrinoless double beta decay, besides the light neutrino mass mechanism, it also provide possibilities of other mechanisms. In my talk, I will focus on the mechanism mediated by the light neutrino, and give the corresponding NMEs from two nuclear many-body approaches: Large Scale Shell Model and...
Go to contribution page -
Volodymyr Tretyak (INR NASU, Ukraine & LNGS INFN, Italy)6/26/25, 1:45 PM
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...
Go to contribution page -
Nahuel Ferreiro Iachellini (University of Milano-Bicocca)6/26/25, 2:15 PM
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...
Go to contribution page -
Jooyoung Lee (Kyungpook National University)6/26/25, 2:45 PM
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....
Go to contribution page -
Hans Hoffmann (TU Dresden)6/27/25, 9:15 AM
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...
Go to contribution page -
Doohyeok Lee (Kyungpook National University)6/27/25, 9:45 AM
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...
Go to contribution page -
Maros Petro (IEAP CTU in Prague)6/27/25, 10:45 AM
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,...
Go to contribution page -
Babar Ali (IEAP CTU in Prague)6/27/25, 11:15 AM
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...
Go to contribution page
Choose timezone
Your profile timezone: