S. Shkarovskiy
A5105366639- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Radioactive Decay and Measurement Techniques
- Magnetic confinement fusion research
- Antenna Design and Analysis
- Black Holes and Theoretical Physics
- Methane Hydrates and Related Phenomena
- Advanced Sensor Technologies Research
- Structural Health Monitoring Techniques
- Radioactivity and Radon Measurements
- Non-Destructive Testing Techniques
- Nuclear physics research studies
Roma Tre University
2024
European Organization for Nuclear Research
2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017-2024
Charles University
2017-2024
Joint Institute for Nuclear Research
2014-2023
L. N. Gumilyov Eurasian National University
2023
UCLouvain
2022-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2013-2022
University of Perugia
2018
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2016-2018
A precision measurement of the ratio RK rates kaon leptonic decays K±→e±ν and K±→μ±ν with full data sample collected by NA62 experiment at CERN in 2007–2008 is reported. The result, obtained analysing ∼150000 reconstructed candidates 11% background contamination, RK=(2.488±0.010)×10−5, agreement Standard Model expectation.
A study of the dynamics rare decay K±→π±γγ has been performed on a sample 232 candidates, with an estimated background 17.4±1.1 events, collected by NA62 experiment at CERN in 2007. The results are combined those from measurement conducted NA48/2 Collaboration CERN. model-independent branching ratio kinematic range z=(mγγ/mK)2>0.2 is BMI(z>0.2)=(0.965±0.063)×10−6, and full assuming Chiral Perturbation Theory description B(Kπγγ)=(1.003±0.056)×10−6. detailed comparison previous measurements performed.
A precision test of lepton flavour universality has been performed by measuring the ratio RK kaon leptonic decay rates K+ --> e+nu and mu+nu in a sample 59813 reconstructed candidates with (8.71 +- 0.24)% background contamination. The result = (2.487 0.013) * 10^{-5} is agreement Standard Model expectation.
The NA62 experiment recorded a large sample of $K^+ \rightarrow μ^+ ν_μ$ decays in 2007. A peak search has been performed the reconstructed missing mass spectrum. In absence signal, limits range $2 \times 10^{-6}$ to $10^{-5}$ have set on squared mixing matrix element $|U_{\mu4} |^2$ between muon and heavy neutrino states, for masses 300-375 MeV/$c^2$. result extends which upper value previous production experiments.
The NA62 experiment collected a large sample of charged kaon decays in 2007 with highly efficient trigger for into electrons. A measurement the $\pi^0$ electromagnetic transition form factor slope parameter from $1.11\times10^{6}$ fully reconstructed $K^\pm \to \pi^\pm \pi^0_D, \pi^0_D e^+ e^-\gamma$ events is reported. measured value $a = (3.68 \pm 0.57)\times10^{-2}$ good agreement theoretical expectations and previous measurements, represents most precise experimental determination...
A bstract measurement of the form factors charged kaon semileptonic decays is presented, based on 4.4 × 10 6 K ± → π 0 e ν ( 3 ) and 2.3 μ collected in 2004 by NA48/2 experiment. The results are obtained with improved precision as compared to earlier measurements. combination measurements modes also presented.
A new measurement of Bπe2, the π+→e+ν(γ) decay branching ratio, is currently under way at Paul Scherrer Institute. The present experimental result on Bπe2 constitutes most accurate test lepton universality available. accuracy, however, still lags behind theoretical precision by over an order magnitude. Because large helicity suppression πe2 decay, its ratio susceptible to significant contributions from physics, making this a particularly suitable subject study.
Building on the rare pion and muon decay results of PIBETA experiment, PEN collaboration has undertaken a precise measurement B_{\pi e2} = R^\pi_{e/\mu}, \pi^+ -> e^+\nu(\gamma) branching ratio, at Paul Scherrer Institute, to reduce present 40\times experimental precision lag behind theory ~ 6-7\times. Because large helicity suppression, R^\pi_{e/\mu} is uniquely sensitive contributions from non-(V-A) physics, making this particularly suitable subject study. Even current precision, value...
The NA62 low mass spectrometer consists of 7000 straw tubes operating in vacuum. front-end electronics is directly mounted on the detector and connected by a flexible PCB. board provides amplification, shaping, discrimination time measurements analogue signals from 16 channels. After digitisation data sent to VME 9U read-out board. data, once matched with trigger, next step used trigger level 1 algorithm. systems will be presented along first results performances.
The NA62 experiment at CERN is aimed measuring the ultra-rare decay K+→ π+ν with 10% accuracy. Since branching fraction of this O(10−10), detector must be able to suppress background events ratios up 10 orders magnitude higher than signal. In order achieve goal a set modern systems has been designed and built. Among them low mass (∼ 1.8% X0) spectrometer detect charged kaon products. contains 7168 straw tubes operating in vacuum. was successfully installed commissioned 2014–2015. report give...
The NA48/2 experiment presents a final result of the charged kaon semileptonic decays form factors measurement based on 4.28 million and 2.91 selected collected in 2004. is competetive with other measurements mode has smallest uncertainty for that leads to most precise combined allows reduce factor |VUS|.
The NA48/2 experiment presents a preliminary result of K ± l decays form factors measurement based on the 4.28 × 10 6 e3 and 2.91 µ3 selected collected in 2004.The is competetive with other measurements mode has smallest uncertainty for , that leads to most precise combined l3 allows reduce factor |V US |.The NA62 large sample charged kaon highly efficient trigger into electrons 2007.A final new electromagnetic transition slope neutral pion time-like momentum region from 1.11 fully...
The NA48/2 experiment presents a final result of the charged kaon semileptonic decays form factors measurement based on 4.28 million and 2.91 selected collected in 2004. is competetive with other measurements mode has smallest uncertainty for , that leads to most precise combined allows reduce factor |VUS|. at CERN very large sample into multiple states. From this data we have reconstructed about 1663 events rare decay K± → μ±νe+e− over almost negligible background region m(e+e−) above 140...
For the development of charged particle detectors based on straw tubes operating in vacuum, a special measurement technique is required for evaluation their mechanical properties. A summary known equations that govern behavior under internal pressure provided, and new experimental method strained pressurized tube study presented this paper. The Poisson's ratio wall, which defines stability conditions built-in tube, measured NA62 spectrometer straw, its minimum pre-tension estimated.
This is the 11 th edition in a series of workshops that had been previously organised Poland
The NA48/2 experiment at CERN reports the first observation of K->pi0e+e-decay from an exposure 1.7x10^11 charged kaon decays recorded in 2003-2004. A sample 4919 candidates with 4.9% background contamination allows determination branching ratio full kinematic region. study space shows evidence for a structure dependent contribution agreement predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated. most precise measurement semi-leptonic...