V. A. Kudryavtsev
A5028554318- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Radiation Therapy and Dosimetry
- Nuclear reactor physics and engineering
- Advanced materials and composites
- Particle Accelerators and Free-Electron Lasers
- Solar and Space Plasma Dynamics
- Quantum, superfluid, helium dynamics
- Planetary Science and Exploration
- CO2 Sequestration and Geologic Interactions
- Magnetic confinement fusion research
- Educational Innovations and Challenges
University of Sheffield
2016-2025
European Organization for Nuclear Research
2025
Sheffield Children's University
2012-2024
National Research Tomsk State University
2020-2024
University of Edinburgh
2009-2024
Universitat Ramon Llull
2023-2024
RWTH Aachen University
2023
Amur State University
2021
Institute for Basic Science
2017-2019
Moscow Engineering Physics Institute
2017-2019
LUX-ZEPLIN (LZ) is a next-generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using two-phase xenon detector with an active mass of 7 tonnes, LZ search primarily for low-energy interactions weakly interacting massive particles (WIMPs), which are hypothesized to make up our galactic halo. In this paper, projected WIMP sensitivity presented based on latest background estimates...
The EDELWEISS-II Collaboration has completed a direct search for WIMP dark matter with an array of ten 400-g cryogenic germanium detectors in operation at the Laboratoire Souterrain de Modane. combined use thermal phonon sensors and charge collection electrodes interleaved geometry enables efficient rejection γ-induced radioactivity as well near-surface interactions. A total effective exposure 384 kg d been achieved, mostly coming from fourteen months continuous operation. Five nuclear...
We present the case for a dark matter detector with directional sensitivity. This document was developed at 2009 CYGNUS workshop on detection, and contains contributions from theorists experimental groups in field. describe need sensitivity; each experiment presents their project's status; we close feasibility study scaling up to one ton detector, which would cost around $150M.
The design and performance of the LUX-ZEPLIN (LZ) detector is described as March 2015 in this Conceptual Design Report. LZ a second-generation dark-matter with potential for unprecedented sensitivity to weakly interacting massive particles (WIMPs) masses from few GeV/c2 hundreds TeV/c2. With total liquid xenon mass about 10 tonnes, will be most sensitive experiment WIMPs region by end decade. This report describes detail technical systems. Expected backgrounds are quantified presented....
The scattering of dark matter (DM) particles with sub-GeV masses off nuclei is difficult to detect using liquid xenon-based DM search instruments because the energy transfer during nuclear recoils smaller than typical detector threshold. However, tree-level DM-nucleus diagram can be accompanied by simultaneous emission a bremsstrahlung photon or so-called "Migdal" electron. These provide an electron recoil component experimental signature at higher energies corresponding recoil. presence...
We present new constraints on the dark matter-induced annual modulation signal using 1.7 years, of COSINE-100 data with a total exposure 97.7 kg$\cdot$years. The experiment, consisting 106 kg NaI(Tl) target material, is designed to carry out model-independent test DAMA/LIBRA's claim WIMP discovery by searching for same target. crystal show 2.7 cpd/kg/keV background rate average in 2--6 keV energy region interest. Using $\chi$-squared minimization method we observe best fit values amplitude...
We report on a search for low-energy (E < 20 keV) WIMP-induced nuclear recoils using data collected in 2009 - 2010 by EDELWEISS from four germanium detectors equipped with thermal sensors and an electrode design (ID) which allows to efficiently reject several sources of background. The indicate no evidence exponential distribution that could be attributed WIMP elastic scattering after exposure 113 kg.d. For WIMPs mass 10 GeV, the observation one event region results 90% CL limit 1.0x10^-5 pb...
This paper reports on the development of a technology involving $$^{100}\hbox {Mo}$$ -enriched scintillating bolometers, compatible with goals CUPID, proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( $$\sim 1~\hbox {kg}$$ ), high optical quality, radiopure -containing zinc and lithium molybdate crystals have been produced used develop performance single detector modules based 0.2–0.4 kg bolometers. In particular, energy resolution...
COSINE is a dark matter search experiment based on an array of low background NaI(Tl) crystals located at the Yangyang underground laboratory. The assembly COSINE-100 was completed in summer 2016 and detector currently collecting physics quality data aimed reproducing DAMA/LIBRA that reported annual modulation signal. Stable operation has been achieved will continue for least two years. Here, we describe design COSINE-100, including shielding arrangement, configuration crystal detection...
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
A key task for customs workers is the interception of hazardous, illegal and counterfeit items in order to protect health safety citizens. However, it estimated that only a small fraction cargo inspected an even smaller trafficked goods are detected. Today, most widely used technology scanning vehicles, ranging from vans trucks railcars, γ ray X-ray radiography. New technologies required overcome current technological shortcomings, such as inability detect target material composition, usage...
We present the Migdal In Galactic Dark mAtter expLoration (MIGDAL) experiment aiming at unambiguous observation and study of so-called effect induced by fast-neutron scattering. It is hoped that this elusive atomic process can be exploited to enhance reach direct dark matter search experiments lower masses, but it still lacking experimental confirmation. Our goal detect predicted electron emission which thought accompany nuclear scattering with low, calculable, probability, deploying an...
Following the first science results of LUX-ZEPLIN (LZ) experiment, a dual-phase xenon time projection chamber operating from Sanford Underground Research Facility in Lead, South Dakota, USA, we report initial limits on model-independent nonrelativistic effective field theory describing complete set possible interactions weakly interacting massive particle (WIMP) with nucleon. These utilize same 5.5 t fiducial mass and 60 live days exposure collected for LZ spin-independent spin-dependent...
This document reports on a series of experimental and theoretical studies conducted to assess the astro-particle physics potential three future large-scale particle detectors proposed in Europe as next generation underground observatories. The apparatus employ different and, some extent, complementary detection techniques: GLACIER (liquid Argon TPC), LENA scintillator) MEMPHYS (\WC), based use large mass liquids active media. results these are presented along with critical discussion...
The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. total data set represents 614 kg.d equivalent exposure. A straightforward method combination was chosen its simplicity before were exchanged between experiments. are interpreted in terms limits on spin-independent WIMP-nucleon cross-section. For a WIMP mass 90 GeV/c^2, where this analysis is most sensitive, cross-section 3.3 x 10^{-44} cm^2 excluded at...
We report on a dark matter search for Weakly Interacting Massive Particle (WIMP) in the mass range $$m_{\chi } \in [4, 30]\,\mathrm{GeV/}c^2$$ with EDELWEISS-III experiment. A 2D profile likelihood analysis is performed data from eight selected detectors lowest energy thresholds leading to combined fiducial exposure of 496 kg-days. External backgrounds $$\gamma $$ - and $$\beta -radiation, recoils $$^{206}\mathrm{Pb}$$ neutrons as well detector intrinsic were modelled outside region interest...
We make use of the EDELWEISS-III array germanium bolometers to search for electron interactions at keV scale induced by phenomena beyond Standard Model. A 90% C.L. lower limit is set on lifetime decaying invisibles, $\tau > 1.2\times 10^{24}$ years. investigate emission axions or axionlike particles (ALPs) Sun, constraining coupling parameters $g_{ae}<1.1\times 10^{-11}$ and $g_{ae}\times g_{aN}^{\rm eff} < 3.5\times 10^{-17}$ in massless limit. also directly absorption bosonic dark matter...
We present the first search for a dark matter annual modulation signal in Southern Hemisphere conducted with NaI(Tl) detectors, performed by DM-Ice17 experiment. Nuclear recoils from interactions are expected to yield an annually modulated independent of location within Earth's hemispheres. DM-Ice17, step DM-Ice experimental program, consists 17 kg located at South Pole under 2200 m.w.e. overburden Antarctic glacial ice. Taken over 3.6 years total exposure 60.8 yr, data consistent no energy...
We present the results of a search for elastic scattering from galactic dark matter in form Weakly Interacting Massive Particles (WIMPs) 4-30 GeV/$c^2$ mass range. make use 582 kg-day fiducial exposure an array 800 g Germanium bolometers equipped with set interleaved electrodes full surface coverage. searched specifically $\sim 2.5-20$ keV nuclear recoils inside detector volume. As illustration number observed events 5 (resp. 20) WIMPs are 9 4), compared to expected background 6.1 1.4). A...
Dual-phase xenon detectors, as currently used in direct detection dark matter experiments, have observed elevated rates of background electron events the low energy region. While this negatively impacts detector performance various ways, its origins only been partially studied. In paper we report a systematic investigation pathologies LUX experiment. We characterize different populations based on their emission intensities and correlations with preceding depositions detector. By studying...