M. Koval

ORCID: 0000-0002-6027-317X
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About
Contact & Profiles
Research Areas
  • Particle physics theoretical and experimental studies
  • Quantum Chromodynamics and Particle Interactions
  • Dark Matter and Cosmic Phenomena
  • High-Energy Particle Collisions Research
  • Neutrino Physics Research
  • Computational Physics and Python Applications
  • Particle Detector Development and Performance
  • Particle Accelerators and Free-Electron Lasers
  • Atomic and Subatomic Physics Research
  • Radiation Detection and Scintillator Technologies
  • Superconducting Materials and Applications
  • Cosmology and Gravitation Theories
  • Astrophysics and Cosmic Phenomena
  • Medical Imaging Techniques and Applications
  • Particle accelerators and beam dynamics
  • Graphite, nuclear technology, radiation studies
  • International Science and Diplomacy
  • Radioactive Decay and Measurement Techniques
  • Pulsars and Gravitational Waves Research
  • Muon and positron interactions and applications
  • Black Holes and Theoretical Physics
  • Methane Hydrates and Related Phenomena
  • Genetics, Aging, and Longevity in Model Organisms
  • Frailty in Older Adults
  • Magnetic confinement fusion research

Charles University
2017-2024

Centre National de la Recherche Scientifique
2023-2024

Romanian Academy
2024

Institute of Biochemistry
2024

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017-2024

Aix-Marseille Université
2023-2024

Roma Tre University
2024

UCLouvain
2022-2023

European Organization for Nuclear Research
2018-2023

Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2022

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.

10.1140/epjc/s10052-024-12565-4 article EN cc-by The European Physical Journal C 2024-04-09

A bstract measurement of the $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} <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:mo>→</mml:mo> <mml:mi>π</mml:mi> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> decay by NA62 experiment at CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to beamline detectors, a higher instantaneous beam...

10.1007/jhep02(2025)191 article EN cc-by Journal of High Energy Physics 2025-02-27

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...

10.1016/j.physletb.2017.02.042 article EN cc-by Physics Letters B 2017-02-22

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...

10.1103/physrevlett.127.131802 article EN cc-by Physical Review Letters 2021-09-24

A bstract The NA62 experiment at CERN, designed to study the ultra-rare decay K + → π $$ \nu \overline{\nu} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> , has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a volume beginning 80 m downstream. search for decaying flight μ − pairs is reported, based sample of 1 . 4 × 10 17...

10.1007/jhep09(2023)035 article EN cc-by Journal of High Energy Physics 2023-09-06

The Experimental Cavern North 3 (ECN3) is an underground experimental cavern on the CERN Pr\'evessin site. ECN3 currently hosts NA62 experiment, with a physics programme devoted to rare kaon decays and searches of hidden particles approved until Long Shutdown (LS3). Several options are proposed longer term in order make best use worldwide unique potential high-intensity/high-energy proton beam extracted from Super Proton Synchrotron (SPS) ECN3. current status their study by Physics Beyond...

10.48550/arxiv.2310.17726 preprint EN other-oa arXiv (Cornell University) 2023-01-01

Abstract The NA62 experiment at CERN utilises a differential Cherenkov counter with achromatic ring focus (CEDAR) for tagging kaons within an unseparated monochromatic beam of charged hadrons. CEDAR-H detector was developed to minimise the amount material in path by using hydrogen gas as radiator medium. shown satisfy kaon requirements test-beam before installation and commissioning experiment. performance measured data collected 2023.

10.1088/1748-0221/19/05/p05005 article EN cc-by Journal of Instrumentation 2024-05-01

The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays flight to electron-positron pairs using a sample of 1.4×10^{17} protons on dump collected 2021. No evidence signal is observed. combined result searches lepton-antilepton final states presented and region the parameter space excluded 90% confidence level, improving previous experimental limits mass values between 50 600 MeV/c^{2} coupling range 10^{-6} 4×10^{-5}. An interpretation e^{+}e^{-} search...

10.1103/physrevlett.133.111802 article EN cc-by Physical Review Letters 2024-09-11

The NA62 experiment at CERN, designed to study the ultra-rare decay $K^+ \to \pi^+\nu\overline{\nu}$, has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a volume beginning 80 m downstream. A search for decaying flight $\mu^+\mu^-$ pairs is reported, based sample of $1.4 \times 10^{17}$ dump 2021. No evidence photon signal observed. region parameter space excluded 90% CL, improving previous experimental...

10.48550/arxiv.2303.08666 preprint EN arXiv (Cornell University) 2023-03-15

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.

10.48550/arxiv.2311.02923 preprint EN other-oa arXiv (Cornell University) 2023-01-01

We summarize the program of working group 1 at 12th Workshop on CKM Unitarity Triangle, whose main subjects covered $V_{ud}$, $V_{us}$, and first-row unitarity as well $V_{cd}$, $V_{cs}$, (semi-)leptonic $D$ decays.

10.48550/arxiv.2406.13703 preprint EN arXiv (Cornell University) 2024-06-19

A measurement of the $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay by NA62 experiment at CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to beamline detectors, a higher instantaneous beam intensity with respect 2016--2018 taking. Combining 2016--2022, $B(K^{+}\rightarrow\pi^{+}\nu\bar{\nu}) = \left( 13.0^{+ 3.3}_{- 3.0} \right)\times10^{-11}$ reported. With $51$ signal candidates observed an expected background $18^{+3}_{-2}$ events,...

10.48550/arxiv.2412.12015 preprint EN arXiv (Cornell University) 2024-12-16

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.

10.1088/1748-0221/11/02/c02064 article EN cc-by Journal of Instrumentation 2016-02-22

10.1393/ncc/i2016-16322-x article EN Il Nuovo Cimento C 2016-12-28

A group of Early-Career Researchers (ECRs) has been given a mandate from the European Committee for Future Accelerators (ECFA) to debate topics current Strategy Update (ESU) Particle Physics and summarise outcome in brief document [1]. full-day with 180 delegates was held at CERN, followed by survey collecting quantitative input. During debate, ECRs discussed future colliders terms physics prospects, their implications accelerator detector technology as well computing software. The...

10.48550/arxiv.2002.02837 preprint EN cc-by arXiv (Cornell University) 2020-01-01
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