A5063369213- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radio Astronomy Observations and Technology
- Advanced Chemical Physics Studies
- Quantum Chromodynamics and Particle Interactions
- Muon and positron interactions and applications
- Gamma-ray bursts and supernovae
- Quantum, superfluid, helium dynamics
- Radioactive Decay and Measurement Techniques
- Radiation Detection and Scintillator Technologies
- Atomic and Molecular Physics
- Advanced NMR Techniques and Applications
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Nuclear reactor physics and engineering
- Pulsars and Gravitational Waves Research
- Environmental Monitoring and Data Management
- Quantum and electron transport phenomena
Comenius University Bratislava
2016-2025
Czech Technical University in Prague
2016-2025
IQM (Germany)
2023-2024
Université Libre de Bruxelles
2022-2024
Pontifical Catholic University of Rio de Janeiro
2022-2024
Universidade Estadual de Londrina
2022-2024
A. Alikhanyan National Laboratory
2022-2024
Beijing Normal University
2022-2024
China Institute of Atomic Energy
2024
China Academy of Space Technology
2024
We show that, within the quasiparticle random phase approximation (QRPA) and renormalized QRPA (RQRPA) based on Bonn-CD nucleon-nucleon interaction, competition between pairing neutron-proton particle-particle particle-hole interactions causes contributions to neutrinoless double-beta decay matrix element nearly vanish at internucleon distances of more than 2 or 3 fermis. As a result, is sensitive short-range/high-momentum physics one naively expects. analyze various ways treating that...
Within the quasiparticle random-phase approximation (QRPA) we achieve partial restoration of isospin symmetry and hence fulfillment requirement that $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ Fermi matrix element ${M}_{F}^{2\ensuremath{\nu}}$ vanishes, as it should, unlike in previous version method. This is accomplished by separating renormalization parameter ${g}_{pp}$ particle-particle proton-neutron interaction into isovector isoscalar parts. The ${g}_{pp}^{T=1}$ needs to be...
A self-consistent calculation of nuclear matrix elements the neutrinoless double-beta decays ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) $^{76}\mathrm{Ge}$, $^{82}\mathrm{Se}$, $^{96}\mathrm{Zr}$, $^{100}\mathrm{Mo}$, $^{116}\mathrm{Cd}$, $^{128}\mathrm{Te}$, $^{130}\mathrm{Te}$, and $^{136}\mathrm{Xe}$ is presented in framework renormalized quasiparticle random phase approximation (RQRPA) standard QRPA. The pairing residual interactions as well two-nucleon short-range...
The observation of neutrinoless double beta decay will have important consequences. First it signal that lepton number is not conserved and the neutrinos are Majorana particles. Second, represents our best hope for determining absolute neutrino mass scale at level a few tens meV. To achieve last goal, however, certain hurdles to be overcome involving particle, nuclear experimental physics. Particle physics since provides mechanisms decay. In this review we emphasize light mechanism. Nuclear...
We have examined the importance of momentum-dependent-induced nucleon currents such as weak-magnetism and pseudoscalar couplings to amplitude neutrinoless double beta decay $(0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ decay) in mechanisms light heavy Majorana neutrino, well that Majoron emission. Such effects are expected occur all nuclear models direction reducing neutrino matrix elements by about $30%.$ To test this we performed a calculation experimentally interesting nuclei...
We review the recent developments in field of nuclear double beta decay, which is presently an important topic both and particle physics. The mechanism lepton number violation within neutrinoless decay (-decay) discussed context problem neutrino mixing R-parity violating supersymmetric extensions standard model. reliable determination matrix elements governing two-neutrino modes addressed. validity different approximation schemes considered structure studies analysed role Pauli exclusion...
The possibility to probe new physics scenarios of light Majorana neutrino exchange and right-handed currents at the planned next generation neutrinoless double beta decay experiment SuperNEMO is discussed. Its ability study different isotopes track outgoing electrons provides means discriminate underlying mechanisms for by measuring half-life electron angular energy distributions.
The nuclear matrix elements $M^{0\nu}$ of the neutrinoless double beta decay ($0\nu\beta\beta$) are evaluated for $^{76}$Ge,$^{100}$Mo, $^{130}$Te, and $^{136}$Xe within Renormalized Quasiparticle Random Phase Approximation (RQRPA) simple QRPA. Three sets single particle level schemes used, ranging in size from 9 to 23 orbits. When strength particle-particle interaction is adjusted so that $2\nu\beta\beta$ rate correctly reproduced, resulting values become essentially independent on basis,...
Observing double beta decay with no neutrinos in the final state, would signal existence of lepton number violating processes and hint at neutrino being a Majorana particle. The impressive effort represented by NEMO-3 experiment sets important constraints on mass lepton-number processes.
Neutrinos, and in particular their tiny but non-vanishing masses, can be considered one of the doors towards physics beyond Standard Model. Precision measurements kinematics weak interactions, 3H β-decay 163Ho electron capture (EC), represent only model independent approach to determine absolute scale neutrino masses. The experiment, ECHo, is designed reach sub-eV sensitivity on mass by means analysis calorimetrically measured spectrum nuclide 163Ho. maximum energy available for this decay,...
The Baikal-GVD neutrino telescope collaboration reports observing the diffuse cosmic flux. Relying on cascade events produced predominantly by electron and tau neutrinos, they observe a significant excess of over what is expected from atmospheric background. power law fit flux observation itself are consistent with independent confirmation landmark results IceCube.
Abstract The $$2\nu 2\beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>2</mml:mn> <mml:mi>ν</mml:mi> <mml:mi>β</mml:mi> </mml:mrow> </mml:math> decay of $$^{150}\hbox {Nd}$$ <mml:mmultiscripts> <mml:mrow/> <mml:mn>150</mml:mn> </mml:mmultiscripts> <mml:mtext>Nd</mml:mtext> to the first excited 740.5 keV $$0^{+}_{1}$$ <mml:msubsup> <mml:mn>0</mml:mn> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> </mml:msubsup> level {Sm}$$ <mml:mtext>Sm</mml:mtext> was measured...
Abstract Recent observations of the Galactic component high-energy neutrino flux, together with detection diffuse gamma-ray emission up to sub-PeV energies, open new possibilities study acceleration and propagation cosmic rays in Milky Way. At same time, both large nonastrophysical backgrounds at TeV energies scarcity events band currently limit these analyses. Here, we use sample cascade estimated above 200 TeV, detected by partially deployed Baikal Gigaton Volume Detector (GVD) 6 yr...
We have investigated the role of proton-neutron pairing in context quasiparticle random phase approximation formalism. This way neutrinoless double beta decay matrix elements experimentally interesting A = 48, 76, 82, 96, 100, 116, 128, 130, and 136 systems been calculated. found that inclusion influences rates significantly, all cases allowing for larger values expectation value light neutrino masses. Using best presently available experimental limits on half lifetime we extracted lepton...
The half-life for double-$\ensuremath{\beta}$ decay of $^{150}\mathrm{Nd}$ has been measured by the NEMO-3 experiment at Modane Underground Laboratory. Using 924.7 days data recorded with $36.55$ g $^{150}\mathrm{Nd}$, we $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ to be ${T}_{1/2}^{2\ensuremath{\nu}}=(9.{11}_{\ensuremath{-}0.22}^{+0.25}(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}0.63(\mathrm{syst}.))\ifmmode\times\else\texttimes\fi{}{10}^{18}$ yr. observed limit on neutrinoless...
In this paper a microscopic approach to calculation of the nuclear matrix element ${M}^{0\ensuremath{\nu}}$ for neutrinoless double-$\ensuremath{\beta}$ decay with an account deformation is presented in length and applied $^{76}\mathrm{Ge}$, $^{150}\mathrm{Nd}$, $^{160}\mathrm{Gd}$. The proton-neutron quasiparticle random-phase approximation realistic residual interaction (the Brueckner $G$ derived from charge-depending Bonn nucleon-nucleon potential) used as underlying structure model....
We revisit the mechanism of neutrinoless double beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay mediated by exchange with heavy Majorana neutrino $N$ arbitrary mass ${m}_{N}$, slightly mixed $\ensuremath{\sim}{U}_{\mathit{eN}}$ electron ${\ensuremath{\nu}}_{e}$. By assuming dominance this mechanism, we update well-known $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$-decay exclusion plot in ${m}_{N}\ensuremath{-}{U}_{\mathit{eN}}$ plane taking into account recent...
In the search for nuclide with largest probability neutrinoless double-electron capture, we have determined Q(ϵϵ) value between ground states of (152)Gd and (152)Sm by Penning-trap mass-ratio measurements. The new 55.70(18) keV results in a half-life 10(26) yr 1 eV neutrino mass. With this smallest among known 0νϵϵ transitions, is promising candidate capture.
The NEMO-3 experiment at the Modane Underground Laboratory has investigated double-$\beta$ decay of $^{48}{\rm Ca}$. Using $5.25$ yr data recorded with a $6.99\,{\rm g}$ sample Ca}$, approximately $150$ candidate events have been selected signal-to-background ratio greater than $3$. half-life for two-neutrino Ca}$ measured to be $T^{2\nu}_{1/2}\,=\,[6.4\, ^{+0.7}_{-0.6}{\rm (stat.)} \, ^{+1.2}_{-0.9}{\rm (syst.)}] \times 10^{19}\,{\rm yr}$. A search neutrinoless yields null result and...