S. Kholodenko
A5059178035- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- Stochastic processes and statistical mechanics
- Nuclear Physics and Applications
- Markov Chains and Monte Carlo Methods
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- Radiation Therapy and Dosimetry
- Advanced Data Storage Technologies
- Radio Astronomy Observations and Technology
- Magnetic confinement fusion research
European Organization for Nuclear Research
2022-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2018-2025
Kurchatov Institute
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2023-2024
National Centre for Nuclear Research
2023-2024
Roma Tre University
2024
Institute of Nuclear Physics, Polish Academy of Sciences
2023-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017-2024
Istituto Nazionale di Fisica Nucleare
2024
Charles University
2023-2024
Abstract Kaon physics is at a turning point – while the rare-kaon experiments NA62 and KOTO are in full swing, end of their lifetime approaching future experimental landscape needs to be defined. With HIKE, KOTO-II LHCb-Phase-II on table under scrutiny, it very good moment time take stock contemplate about opportunities these theoretical developments provide for particle coming decade beyond. This paper provides compact summary talks discussions from Kaons@CERN 2023 workshop, held September CERN.
The design of next-generation calorimeters for accelerator-borne experiments at the intensity frontier poses unprecedented challenges with regard to timing performance and radiation resistance, while rivaling current state art in terms energy resolution. A significant role may be played by quantum dots, i.e., light-emitting semiconductor nanocrystals high yield rather easy manufacture. Quantum dots can cast into an optically transparent polymer matrix obtain nanocomposite scintillators,...
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.
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...
Searches for the lepton number violating ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\mu}}^{+}{e}^{+}$ decay and flavor ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}{e}^{+}$ ${\ensuremath{\pi}}^{0}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}{e}^{+}$ decays are reported using data collected by NA62 experiment at CERN in 2017--2018. No evidence these is found upper limits of branching ratios obtained...
Crilin (Crystal Calorimeter with Longitudinal Information) is a semi-homogeneous, longitudinally segmented electromagnetic calorimeter based on high- Z , ultra-fast crystals UV-extended SiPM readout. The design has been proposed as candidate solution for both future Muon Collider barrel ECAL and the Small Angle of HIKE experiment. As part development program, we have carried out beam tests small (10 × 10 40 mm 3 ) lead fluoride (PbF 2 tungstate (PbWO 4 PWO-UF) 120 GeV electrons at CERN SPS...
A high statistics data sample of the $$K^{+}\rightarrow \mu ^{+}\nu _{\mu }$$ decay was accumulated by OKA experiment in 2012. The missing mass analysis performed to search for channel _{H}$$ with a hypothetic stable heavy neutrino final state. obtained spectrum does not show peaks that could be attributed existence neutrinos range $$(270< m_{\nu _{H}} < 375)$$ MeV $$/c^{2}$$ . As result, upper limits on branching ratio and value mixing element $$|U_{\mu H}|^{2}$$ are obtained.
Results of a study the $K^+ \rightarrow \pi^{0} e^{+} \nu \gamma $ decay at OKA setup are presented. More than 32000 events this observed. The differential spectra over photon energy and photon-electron opening angle in kaon rest frame branching ratios, normalized to that $K_{e3}$ calculated for different cuts $E^*_\gamma$ $cos\Theta^{*}_{e\gamma}$. In particular, ratio $E^{*}_{\gamma}>30$ MeV $\Theta^{*}_{e \gamma}>20^{\circ}$ is measured R = $\frac{Br(K^+ \nu_{e} \gamma) } {Br(K^+...
Precise measurements of the branching ratios for flavor-changing neutral current decays $K\to\pi\nu\bar{\nu}$ can provide unique constraints on CKM unitarity and, potentially, evidence new physics. It is important to measure both decay modes, $K^+\to\pi^+\nu\bar{\nu}$ and $K_L\to\pi^0\nu\bar{\nu}$, since different physics models affect rates each channel differently. The goal NA62 experiment at CERN SPS BR charged within 10%. For channel, has never been measured. We are designing KLEVER...
Kaon physics is at a turning point -- while the rare-kaon experiments NA62 and KOTO are in full swing, end of their lifetime approaching future experimental landscape needs to be defined. With HIKE, KOTO-II LHCb-Phase-II on table under scrutiny, it very good moment time take stock contemplate about opportunities these theoretical developments provide for particle coming decade beyond. This paper provides compact summary talks discussions from Kaons@CERN 2023 workshop.
A spaghetti calorimeter (SPACAL) prototype with scintillating crystal fibres was assembled and tested electron beams of energy from 1 to 5 GeV. The comprised radiation-hard Cerium-doped Gd$_3$Al$_2$Ga$_3$O$_{12}$ (GAGG:Ce) Y$_3$Al$_5$O$_{12}$ (YAG:Ce) embedded in a pure tungsten absorber. resolution studied as function the incidence angle beam found be order $10\% / \sqrt{E} \oplus1\%$, line LHCb Shashlik technology. time measured metal channel dynodes photomultipliers placed contact or...
A precise measurement of the vector and axial-vector form factors difference $F_V-F_A$ in $K^+\rightarrow{\mu^+}{\nu_{\mu}}{\gamma}$ decay is presented. About 95K events are selected OKA experiment. The result $F_V-F_A=0.134\pm0.021(stat)\pm0.027(syst)$. Both errors smaller than previous measurements.
The results of time resolution measurements on cosmic muons with MWPC chambers as a tracking system are presented. Two options dual SiPM readout considered: direct light collection from opposite cut corners the scintillator and using two oppositely directed bundles WLS fibers. types SiPMs used: S10985-050C MicroFB-60035. best result achived mean-time between SiPMs. For 134 × 107 20 mm3 σ = 300±10 ps maximum signal arrival spread ΔT 1.6±0.2 ns. Using fiber option 265 30 tile 150±50 370±10 ps.
A high statistics data sample of the decays $$K^+$$ mesons to three charged particles was accumulated by OKA experiment in 2012 and 2013. This allowed select a clean about 450 events with $$K^{+}\rightarrow \pi ^{+}\pi ^{-}\pi ^{+}\gamma $$ energy photon kaon rest frame greater than 30 MeV. The measured branching fraction , $$E_{\gamma }^{*} > 30\ \hbox {MeV}$$ is equal $$(0.71 \pm 0.05) \times 10^{-5}$$ . differential over compared prediction chiral perturbation theory $${\mathcal...
Abstract A high-statistics data sample of the $$K^{+}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> decays is recorded by OKA collaboration. missing mass analysis performed to search for a light invisible pseudoscalar axion-like particle (ALP) in decay $$K^{+} \rightarrow \pi ^{+} ^{0} a$$ <mml:mrow> <mml:mo>→</mml:mo> <mml:mi>π</mml:mi> <mml:mn>0</mml:mn> <mml:mi>a</mml:mi> </mml:mrow> . No signal...
Semiconductor nanocrystals (quantum dots) are light emitters with high quantum yield that relatively easy to manufacture. There is therefore much interest in their possible application for the development of high-performance scintillators use high-energy physics. However, few previous studies have focused on response these materials particles. To evaluate potential nanocomposite calorimetry, we performing side-by-side tests fine-sampling shashlyk calorimeter prototypes both conventional and...