M. Moulson
A5087603714- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Crystallography and Radiation Phenomena
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Nuclear materials and radiation effects
- Pulsars and Gravitational Waves Research
- Muon and positron interactions and applications
- Medical Imaging Techniques and Applications
- Distributed and Parallel Computing Systems
- Scientific Research and Discoveries
- Radiation Therapy and Dosimetry
- Black Holes and Theoretical Physics
- Integrated Circuits and Semiconductor Failure Analysis
- Radioactivity and Radon Measurements
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2011-2024
Roma Tre University
2024
Centre National de la Recherche Scientifique
2023-2024
Aix-Marseille Université
2023-2024
Istituto Nazionale di Fisica Nucleare
2004-2023
Campbell Collaboration
2013-2022
University of Ferrara
2022
University of Brescia
2022
UCLouvain
2022
Johannes Gutenberg University Mainz
2017-2022
Abstract The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting the full scientific potential of CERN’s accelerator complex and infrastructures through projects complementary to LHC other possible future colliders. These will target fundamental physics questions in modern particle physics. This document presents status proposals presented framework Standard Model working group, explore their reach impact that CERN could have next 10–20 years on international landscape.
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 bstract The NA62 experiment reports the branching ratio measurement $$ \mathrm{BR}\left({K}^{+}\to {\pi}^{+}\nu \overline{\nu}\right)=\left({10.6}_{-3.4}^{+4.0}\left|{}_{\mathrm{stat}}\right.\pm {0.9}_{\mathrm{syst}}\right)\times {10}^{-11} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>BR</mml:mi> <mml:mfenced> <mml:mrow> <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>...
Precision tests of first-row unitarity the Cabibbo-Kobayashi-Maskawa matrix currently display two intriguing tensions, both at $3\sigma$ level. First, combining determinations $V_{ud}$ from superallowed $\beta$ decays with $V_{us}$ kaon suggests a deficit in relation. At same time, tension similar significance has emerged between $K_{\ell 2}$ and 3}$ decays. In this Letter, we point out that measurement $K_{\mu3}/K_{\mu branching fraction level $0.2\%$ would have considerable impact on...
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.
A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by NA62 experiment at CERN 2017–2018 is reported. Upper limits of extended neutrino mixing matrix element |Ue4|2 are established level 10−9 over most accessible mass range 144–462 MeV/c2, with assumption that lifetime exceeds 50 ns. These improve significantly upon those previous and decay searches. The favoured Big Bang Nucleosynthesis excluded up to a about 340 MeV/c2.
The NA62 experiment at CERN reports searches for $K^+\to\mu^+N$ and $K^+\to\mu^+\nu X$ decays, where $N$ $X$ are massive invisible particles, using the 2016-2018 data set. particle is assumed to be a heavy neutral lepton, results expressed as upper limits of ${\cal O}(10^{-8})$ neutrino mixing parameter $|U_{\mu4}|^2$ masses in range 200-384 MeV/$c^2$ lifetime exceeding 50 ns. considered scalar or vector hidden sector mediator decaying an final state, decay branching fraction 10-370 reported...
Semi-inclusive proton and pion distributions from central Au+Au reactions at 11.6A GeV/c have been measured. The rapidity distribution shows significantly increased stopping compared to lighter systems, providing strong evidence for the formation of a state matter with baryon density substantially greater than normal nuclear matter. Unlike this energy induced by heavy ions, low mt−m0 invariant spectra deviate single exponential shape become flatter, while π− are found rise faster π+...
A bstract The NA62 experiment at the CERN SPS reports a study of sample 4 × 10 9 tagged π 0 mesons from K + → ( γ ), searching for decay to invisible particles. No signal is observed in excess expected background fluctuations. An upper limit . − set on branching ratio 90% confidence level, improving previous results by factor 60. This result can also be interpreted as model- independent X , where particle escaping detection with mass range 0.110–0.155 GeV /c 2 and rest lifetime greater than...
A sample of 3984 candidates the K+→π+γγ decay, with an estimated background 291±14 events, was collected by NA62 experiment at CERN during 2017–2018. In order to describe observed di-photon mass spectrum, next-to-leading contribution in chiral perturbation theory found be necessary. The decay branching ratio full kinematic range is measured (9.61±0.17)×10−7. first search for production and prompt axion-like particle gluon coupling process K+→π+a, a→γγ also reported.
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,...
An excitation function of proton rapidity distributions for different centralities is reported from AGS Experiment E917 $\mathrm{Au}+\mathrm{Au}$ collisions at 6, 8, and 10.8 GeV/nucleon. The peripheral have a valley midrapidity which smoothly change to that display broad peak central collisions. mean loss increases with increasing beam energy, whereas the fraction protons consistent isotropic emission stationary source decreases energy. data suggest stopping substantially less than complete...
This report details the capabilities of LHCb and its upgrades towards study kaons hyperons. The analyses performed so far are reviewed, elaborating on prospects for some key decay channels, while proposing new measurements in to expand strangeness research program.