The XENONnT experiment is a multi-ton-scale liquid-xenon detector operated by the XENON Collaboration in search of dark matter and other beyond the standard model phenomena. The dual-phase time projection chamber (TPC) design enables simultaneous measurement of scintillation and ionization signals produced by interactions within the target volume, which can be utilized to reconstruct the...
LUX-ZEPLIN (LZ) is a dark matter direct detection experiment located at the Sanford Underground Research Facility in Lead, South Dakota. At the heart of the detector is a dual-phase time projection chamber containing 7 tonnes of active liquid xenon. During its 1000-day science run, LZ aims to achieve unprecedented sensitivity to Weakly Interacting Massive Particles (WIMPs) down to a...
In this communication, recent advances on the design, development and experimental validation of fluorescent indicators for barium tagging in double beta decay reactions of Xe-136 to yield one Ba(2+)-136 cation plus two electrons will be presented. These developments include mono- and bicolor indicators. The components of the fluorescent sensors include a Barium catcher and a fluorophore,...
The MEG II experiment aims to discover the charged lepton flavor violation decay, μ+→e+γ, using high intensity continuous muon beam in the PSI. The MEG II began physics run since 2021 and we published first result with the an upper limit on the branching ratio of B(μ+ → e+γ) < 7.5 × 10^{−13} (90 % C.L.). We continue to take physics run also in 2022 and 2023, and will continue by 2026....
The RELICS experiment is dedicated to the search for the Coherent Elastic ν-Nucleus Scattering (CEvNS) process between neutrinos of approximately MeV energy and xenon nuclei, to be conducted at the Sanmen nuclear power plant using a ～30-kilogram dual-phased xenon detector. We have developed a dual-phased Xenon Time Projection Chamber prototype, the RELICS prototype, containing ~0.6 kg of xenon...
The pursuit of neutrinoless double beta decay (0νββ) detection stands at the forefront of particle physics research, promising profound insights into fundamental physics beyond the Standard Model. nEXO, a cutting-edge experiment, endeavors to explore this phenomenon utilizing a 5-tonne liquid xenon (LXe) time projection chamber (TPC), enriched to 90% in Xe136, poised to achieve a half-life...
Coating detector materials with films highly reflective in the vacuum ultraviolet (VUV) region improves sensitivity of the next-generation rare-event detectors that use liquid xenon (LXe). In particular, nEXO requires its Cu field-shaping rings and cathode to be coated by films that are 80% reflective at 175 nm, the mean wavelength of LXe scintillation. Other experiments, like DARWIN, could...
DM direct detection aims to test the cross-section between galactic DM particles and an underground detector's nucleons. Although Weakly Interacting Massive Particles (WIMPs) is the most discussed DM candidate, the null-WIMPs conclusion has been consistently addressed by the most convincing experiments in the field. The low-mass WIMPs region (100s MeV/c^2 - 10 GeV/c^2), however, has not been...
The recent detection of the coherent elastic neutrino-nucleus scattering (CEνNS) opens the possibility to detect neutrinos with small-size detectors and with different techniques, opening a new window to explore possible BSM physics.
The CEνNS process generates signals at the few-keV level, requiring sensitive detection technologies for its observation. The European Spallation Source (ESS)...
The dark matter experiment XENONnT utilizes about 8.6 tonnes of liquid
xenon for the direct search of Weakly Interacting Massive Particles (WIMPS) and other rare event searches, employing a dual-phase Time Projection Chamber (LXe TPC).
In order to reach world-leading senstivities for the several physics channels, the target material xenon needs to be ultra-pure. Electrogentive impurities...
Direct dark matter searches require an ultra-low background, which is essential to improving sensitivity. Many efforts have been made to reduce and understand these techniques.
XENON1T observed an event excess at 1-7 keV in 2020, but not in XENONnT, which is thought to be background due to tritium. Quantitatively assessing this background is useful for future experiments.
In this talk, I...
