A5053659062- 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
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Stochastic processes and statistical mechanics
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Advanced NMR Techniques and Applications
- Graphite, nuclear technology, radiation studies
- Nuclear Physics and Applications
- Algorithms and Data Compression
- Markov Chains and Monte Carlo Methods
- Non-Destructive Testing Techniques
- Radio Astronomy Observations and Technology
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2020-2024
RWTH Aachen University
2023-2024
Roma Tre University
2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017-2024
Charles University
2017-2024
Universitat Ramon Llull
2023
University of Birmingham
2017-2023
UCLouvain
2023
Universitat de Barcelona
2023
NA62 is a fixed-target experiment at the CERN SPS dedicated to measurements of rare kaon decays. Such measurements, like branching fraction K+ → π+ ν decay, have potential bring significant insights into new physics processes when comparison made with precise theoretical predictions. For this purpose, innovative techniques been developed, in particular, domain low-mass tracking devices. Detector construction spanned several years from 2009 2014. The collaboration started detector...
A search for heavy neutral lepton production in $K^+$ decays using a data sample collected with minimum bias trigger by the NA62 experiment at CERN 2015 is reported. Upper limits $10^{-7}$ to $10^{-6}$ level are established on elements of extended neutrino mixing matrix $|U_{\ell 4}|^2$ ($\ell=e,\mu$) mass range $170-448~{\rm MeV}/c^2$. This improves results from previous searches decays, setting more stringent and extending range.
The NA62 experiment at CERN SPS is designed to study the $K^+\to\pi^+\nu\bar\nu$ decay. After collecting data in 2016, 2017, and 2018, has resumed taking 2021 received approval for operations until onset of LS3. first search lepton number violating decay $K^+\to\pi^0\pi^-\mu^+ e^+$ flavour decays $K^+\to\pi^0\pi^+\mu^+ e^-$ , $K^+\to\pi^0\pi^+\mu^- reported. More recent results from analyses $K^+\to\pi^+\gamma\gamma$ $\pi^0\to e^+e^-$ are also Additionally, New Physics collected during...
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.
Abstract The use of a new optoelectronic readout chain with 𝒪(100)ps time resolution is major milestone in the development RICH detectors for environments high number particle interactions per bunch crossing, such as High-Luminosity LHC. A prototype chain, based on MAPMT and SiPM photon sensors coupled to electronics integrating FastIC ASIC TDC-in-FPGA, presented. an 8-channel analogue-to-digital conversion 25 ps resolution. This predecessor FastRICH LHCb upgrades. signals from are...
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...
A bstract The NA62 experiment at CERN, designed to study the ultra-rare decay K + → π $$ \nu \overline{\nu} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> , has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a volume beginning 80 m downstream. search for decaying flight μ − pairs is reported, based sample of 1 . 4 × 10 17...
A high statistics data sample of the $$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.
The Ring Imaging Cherenkov detector is crucial for the identification of charged particles in NA62 experiment at CERN SPS. commissioning was completed 2016 by precise alignment mirrors using reconstructed tracks. procedure and measurement basic performance are described. radius resolution, ring centre single hit resolution mean number hits per evaluated positron contribution residual mirror misalignment to calculated.
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...
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.
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...
A large RICH detector is used in NA62 to suppress the muon contamination charged pion selection by a factor 100 momentum range between 15 and 35 GeV/c. The consists of 17 m long tank (vessel), filled with neon gas at atmospheric pressure. Cherenkov light reflected mosaic 20 spherical mirrors focal length, placed downstream end, collected 1952 photomultipliers (PMTs) upstream end. In this paper characterization before installation mirror support system are described. procedure laser alignment...
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 first search for ultra-rare $K^+$ decays into the $\pi^+e^+e^-e^+e^-$ final state is reported, using a dataset collected by NA62 experiment at CERN in 2017-2018. An upper limit of $1.4\times 10^{-8}$ 90% CL obtained branching ratio $K^+\to\pi^+e^+e^-e^+e^-$ decay, predicted Standard Model to be $(7.2\pm0.7)\times 10^{-11}$. Upper limits are level $10^{-9}$ ratios two prompt decay chains involving pair-production hidden-sector mediators: $K^+\to\pi^+aa$, $a\to e^+e^-$ and $K^+\to\pi^+S$,...
A large RICH detector is used in NA62 to suppress the muon contamination charged pion sample by a factor of 100 momentum range between 15 and 35 GeV/c. Cherenkov light collected 1952 photomultipliers placed at upstream end. In this paper characterization dedicated Frontend Data Acquisition electronics are described, time resolution detection efficiency measurement presented.