A. Chernogorov
A5028712929- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Muon and positron interactions and applications
- Nuclear Physics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Medical Imaging Techniques and Applications
- Computational Physics and Python Applications
- Geophysical and Geoelectrical Methods
- Electric Power Systems and Control
- Color Science and Applications
- Geophysical Methods and Applications
- Cybersecurity and Information Systems
- Particle Accelerators and Free-Electron Lasers
- Advanced Data Processing Techniques
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- X-ray Spectroscopy and Fluorescence Analysis
Kurchatov Institute
2016-2024
Institute for Theoretical and Experimental Physics
2015-2024
Institute on Taxation and Economic Policy
2015-2017
Lomonosov Moscow State University
2009
Neutrinoless double beta decay is a process that violates lepton number conservation. It predicted to occur in extensions of the standard model particle physics. This Letter reports results from phase I Germanium Detector Array (GERDA) experiment at Gran Sasso Laboratory (Italy) searching for neutrinoless isotope $^{76}\mathrm{Ge}$. Data considered present analysis have been collected between November 2011 and May 2013 with total exposure 21.6 kg yr. A blind performed. The background index...
The GERmanium Detector Array (GERDA) experiment searched for the lepton-number-violating neutrinoless double-$\beta$ ($0\nu\beta\beta$) decay of $^{76}$Ge, whose discovery would have far-reaching implications in cosmology and particle physics. By operating bare germanium diodes, enriched an active liquid argon shield, GERDA achieved unprecedently low background index $5.2\times10^{-4}$ counts/(keV$\cdot$kg$\cdot$yr) signal region met design goal to collect exposure 100 kg$\cdot$yr a...
The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of ^{76}Ge (^{76}Ge→^{76}Se+2e^{-}) operating bare Ge diodes with an enriched fraction in liquid argon. exposure broad-energy germanium type (BEGe) detectors is increased threefold respect to our previous data release. BEGe feature excellent background suppression from analysis time profile detector signals. In window a level 1.0_{-0.4}^{+0.6}×10^{-3} counts/(keV kg yr) has been achieved; if normalized...
The Gerda collaboration is performing a search for neutrinoless double beta decay of 76Ge with the eponymous detector. experiment has been installed and commissioned at Laboratori Nazionali del Gran Sasso started operation in November 2011. design, construction first operational results are described, along detailed information from R&D phase.
The observation of neutrinoless double-beta decay (0${\nu}{\beta}{\beta}$) would show that lepton number is violated, reveal neutrinos are Majorana particles, and provide information on neutrino mass. A discovery-capable experiment covering the inverted ordering region, with effective masses 15 - 50 meV, will require a tonne-scale excellent energy resolution extremely low backgrounds, at level $\sim$0.1 count /(FWHM$\cdot$t$\cdot$yr) in region signal. current generation $^{76}$Ge experiments...
A discovery that neutrinos are not the usual Dirac but Majorana fermions, i.e. identical to their antiparticles, would be a manifestation of new physics with profound implications for particle and cosmology. generate neutrinoless double-$\beta$ ($0\nu\beta\beta$) decay, matter-creating process without balancing emission antimatter. So far, 0$\nu\beta\beta$ decay has eluded detection. The GERDA collaboration searches $0\nu\beta\beta$ $^{76}$Ge by operating bare germanium detectors in an...
A search for neutrinoless $\beta\beta$ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at Laboratori Nazionali del Gran Sasso INFN (Italy). Processes spectral indices n = 1, 2, 3, 7 were searched for. No signals found and lower limits order 10$^{23}$ yr on their half-lives derived, yielding substantially improved results compared to previous experiments $^{76}$Ge. new result half-life...
The GERmanium Detector Array (GERDA) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta decay 76Ge. signature signal a monoenergetic peak 2039 keV, Q-value decay, Q_bb. To avoid bias in search, present analysis does not consider all those events, that fall 40 keV wide region centered around main parameters needed are described. A background model was developed to describe observed energy spectrum. contains several contributions,...
The GERDA experiment located at the LNGS searches for neutrinoless double beta (0\nu\beta\beta) decay of ^{76}Ge using germanium diodes as source and detector. In Phase I eight semi-coaxial five BEGe type detectors have been deployed. latter is used in this field research first time. All are made from material with enriched fraction. experimental sensitivity can be improved by analyzing pulse shape detector signals aim to reject background events. This paper documents algorithms developed...
The GERDA collaboration is performing a sensitive search for neutrinoless double beta decay of $^{76}$Ge at the INFN Laboratori Nazionali del Gran Sasso, Italy. upgrade experiment from Phase I to II has been concluded in December 2015. first data release shows that goal suppress background by one order magnitude compared achieved. thus will remain background-free up its design exposure (100 kg yr). It reach thereby half-life sensitivity more than 10$^{26}$ yr within 3 years collection. This...
The GERmanium Detector Array (Gerda) at the Gran Sasso Underground Laboratory (LNGS) searches for neutrinoless double beta decay ( $$0\nu \beta $$ ) of $$^{76}$$ Ge. Germanium detectors made material with an enriched Ge fraction act simultaneously as sources and this decay. During Phase I theexperiment mainly refurbished semi-coaxial from former experiments were used. For upcoming II, 30 new broad energy germanium (BEGe)-type produced. A subgroup these has already been deployed in Gerda...
The primary goal of the GERmanium Detector Array (Gerda) experiment at Laboratori Nazionali del Gran Sasso INFN is search for neutrinoless double beta decay 76 Ge.High-purity germanium detectors made from material enriched in Ge are operated directly immersed liquid argon, allowing a substantial reduction background with respect to predecessor experiments.The first 5.04 kg•yr data collected Phase I have been analyzed measure half-life neutrinoaccompanied Ge.The observed spectrum energy range...
We propose the construction of LEGEND-1000, ton-scale Large Enriched Germanium Experiment for Neutrinoless $\beta \beta$ Decay. This international experiment is designed to answer one highest priority questions in fundamental physics. It consists 1000 kg Ge detectors enriched more than 90% $^{76}$Ge isotope operated a liquid argon active shield at deep underground laboratory. By combining lowest background levels with best energy resolution field, LEGEND-1000 will perform...
We present the measurement of two-neutrino double-β decay rate 76Ge performed with GERDA Phase II experiment. With a subset entire exposure, 11.8 kg yr, half-life process has been determined: T2ν1/2=(2.022±0.018stat±0.038syst)×1021 yr. This is most precise determination and one measurements process. The relevant nuclear matrix element can be extracted: M2νeff=(0.101±0.001).Received 13 May 2023Accepted 15 August 2023DOI:https://doi.org/10.1103/PhysRevLett.131.142501Published by American...
An optimized digital shaping filter has been developed for the Gerda experiment which searches neutrinoless double beta decay in $$^{76}$$ Ge. The Phase I energy calibration data have reprocessed and an average improvement of 0.3 keV resolution (FWHM) corresponding to 10 % at $$Q$$ value $$0\nu \beta $$ Ge is obtained. This possible thanks enhanced low-frequency noise rejection this Zero Area Cusp (ZAC) signal filter.
We present the first search for bosonic superweakly interacting massive particles (super-WIMPs) as keV-scale dark matter candidates performed with GERDA experiment. is a neutrinoless double-β decay experiment which operates high-purity germanium detectors enriched in ^{76}Ge an ultralow background environment at Laboratori Nazionali del Gran Sasso (LNGS) of INFN Italy. Searches were pseudoscalar and vector mass region from 60 keV/c^{2} to 1 MeV/c^{2}. No evidence signal was observed, most...
A bstract The GERmanium Detector Array (Gerda) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double-beta (0 νββ ) decay 76 Ge. technological challenge Gerda to operate in a “background-free” regime region interest (ROI) after analysis cuts full 100 kg · yr target exposure experiment. careful modeling and decomposition full-range energy spectrum essential predict shape composition events ROI around Q ββ 0 search, extract precise measurement...
The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0νββ) in 76Ge, located at Laboratori Nazionali del Gran Sasso INFN (Italy). In first phase experiment, a 90% confidence level (C.L.) sensitivity 2.4⋅1025 yr on 0νββ half-life was achieved with 21.6 kg⋅yr exposure and unprecedented background index region interest 10−2 counts/(keV⋅kg⋅yr). No excess signal events found, experimental lower limit 2.1 ⋅ 1025 (90% C.L.) established....
The GERmanium Detector Array (Gerda) collaboration searched for neutrinoless double- β decay in 76 Ge using isotopically enriched high purity germanium detectors at the Laboratori Nazionali del Gran Sasso of INFN. After Phase I (2011-2013), experiment benefited from several upgrades, including an additional active veto based on LAr instrumentation and a significant increase mass by point-contact that improved half-life sensitivity II (2015-2019) order magnitude. At core background mitigation...
Abstract The ability to detect liquid argon scintillation light from within a densely packed high-purity germanium detector array allowed the Gerda experiment reach an exceptionally low background rate in search for neutrinoless double beta decay of $${}^{76}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>76</mml:mn> </mml:msup> </mml:math> Ge. Proper modeling propagation throughout experimental setup, any origin volume its eventual detection by...