A. Meregaglia
A5002441186- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Muon and positron interactions and applications
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- High-Energy Particle Collisions Research
- Noncommutative and Quantum Gravity Theories
- Radiation Therapy and Dosimetry
- Scientific Research and Discoveries
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Astronomy and Astrophysical Research
- Quantum Mechanics and Applications
- CCD and CMOS Imaging Sensors
- Advanced Frequency and Time Standards
- Cosmology and Gravitation Theories
- Scientific Computing and Data Management
Université de Bordeaux
2017-2025
Centre National de la Recherche Scientifique
2016-2025
Laboratoire de Physique des deux infinis Bordeaux
2017-2025
Institut National de Physique Nucléaire et de Physique des Particules
2012-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2022-2024
Laboratoire Photonique, Numérique et Nanosciences
2024
Université de Strasbourg
2013-2023
Institut Pluridisciplinaire Hubert Curien
2013-2022
Université Libre de Bruxelles
2022
Pontifical Catholic University of Rio de Janeiro
2022
A bstract The OPERA neutrino experiment is designed to perform the first observation of oscillations in direct appearance mode ν μ → τ channel, via detection -leptons created charged current interactions. detector, located underground Gran Sasso Laboratory, consists an emulsion/lead target with average mass about 1.2 kt, complemented by electronic detectors. It exposed CERN Neutrinos beam, a baseline 730 km and mean energy 17 GeV. candidate event analysis 2008-2009 sample have been reported...
We report the first results of DarkSide-50, a direct search for dark matter operating in underground Laboratori Nazionali del Gran Sasso (LNGS) and searching rare nuclear recoils possibly induced by weakly interacting massive particles (WIMPs). The detector is Liquid Argon Time Projection Chamber with (46.4+-0.7) kg active mass, operated inside 30 t organic liquid scintillator neutron veto, which turn installed at center 1 kt water Cherenkov veto residual flux cosmic rays. here null...
The Double Chooz experiment presents improved measurements of the neutrino mixing angle θ 13 using data collected in 467.90 live days from a detector positioned at an average distance 1050 m two reactor cores nuclear power plant. Several novel techniques have been developed to achieve significant reductions backgrounds and systematic uncertainties with respect previous publications, whereas efficiency $$ {\overline{\nu}}_e signal has increased. value is measured be sin2 2θ = 0.090 − 0.029 +...
Liquid argon is a bright scintillator with potent particle identification properties, making it an attractive target for direct-detection dark matter searches. The DarkSide-50 search here reports the first WIMP results obtained using of low-radioactivity argon. detector, two-phase liquid time projection chamber, located at Laboratori Nazionali del Gran Sasso. underground shown to contain Ar-39 level reduced by factor (1.4 +- 0.2) x 10^3 relative atmospheric We report background-free null...
Interaction cross sections and charged pion spectra in p+C interactions at 31 GeV/c were measured with the large acceptance NA61/SHINE spectrometer CERN SPS. These data are required to improve predictions of neutrino flux for T2K long baseline oscillation experiment Japan. A set collected during first run 2007 an isotropic graphite target a thickness 4% nuclear interaction length was used analysis. The inelastic production 257.2 +- 1.9 8.9 mb 229.3 9.0 mb, respectively. Inclusive negatively...
The OPERA experiment was designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode, i.e. by detecting the $\tau$-leptons produced charged current $\nu_{\tau}$ interactions. took data from 2008 2012 CERN Neutrinos Gran Sasso beam. observation of appearance, achieved with four candidate events a sub-sample data, previously reported. In this paper, fifth event, found an enlarged sample, is described. Together further reduction expected background, detected so far...
The OPERA experiment was designed to study ν_{μ}→ν_{τ} oscillations in the appearance mode CERN Gran Sasso Neutrino beam (CNGS). In this Letter, we report final analysis of full data sample collected between 2008 and 2012, corresponding 17.97×10^{19} protons on target. Selection criteria looser than previous analyses have produced ten ν_{τ} candidate events, thus reducing statistical uncertainty measurement oscillation parameters properties. A multivariate approach for event identification...
The release of GENIE v3.0.0 was a major milestone in the long history project, delivering several alternative comprehensive neutrino interaction models, improved charged-lepton scattering simulations, range beyond Standard Model simulation capabilities, experimental interfaces, expanded core framework and advanced new frameworks for global analysis data tuning models. Steady progress continued following v3.0.0. New tools large number physics model configurations, tunes have been made...
We summarize the results of a study performed within GENIE global analysis framework, revisiting bare-nucleon cross-section tuning and, in particular, (a) inclusive cross section, (b) section low-multiplicity inelastic channels (single-pion and double-pion production), (c) relative contributions resonance nonresonance processes to these final states. The same was with several different comprehensive model sets available Generator v3. In this work we perform careful investigation observed...
This document reports on a series of experimental and theoretical studies conducted to assess the astro-particle physics potential three future large-scale particle detectors proposed in Europe as next generation underground observatories. The apparatus employ different and, some extent, complementary detection techniques: GLACIER (liquid Argon TPC), LENA scintillator) MEMPHYS (\WC), based use large mass liquids active media. results these are presented along with critical discussion...
Spectra of positively charged kaons in p+C interactions at 31 GeV/c were measured with the NA61/SHINE spectrometer CERN SPS. The analysis is based on full set data collected 2007 a graphite target thickness 4% nuclear interaction length. Interaction cross sections and pion spectra already using same data. These new measurements combination published ones are required to improve predictions neutrino flux for T2K long baseline oscillation experiment Japan. In particular, knowledge kaon...
The OPERA experiment is designed to search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ oscillations in appearance mode, i.e., through the direct observation of $\ensuremath{\tau}$ lepton ${\ensuremath{\nu}}_{\ensuremath{\tau}}$-charged current interactions. has taken data five years, since 2008, with CERN Neutrino Gran Sasso beam. Previously, two ${\ensuremath{\nu}}_{\ensuremath{\tau}}$ candidates a decaying into hadrons were...
The Double Chooz collaboration presents a measurement of the neutrino mixing angle θ 13 using reactor $$ \overline{\nu_{\mathrm{e}}} observed via inverse beta decay reaction in which neutron is captured on hydrogen. This based 462.72 live days data, approximately twice as much data previous such analysis, collected with detector positioned at an average distance 1050 m from two cores. Several novel techniques have been developed to achieve significant reductions backgrounds and systematic...
A bstract first result of the search for ν μ → e oscillations in OPERA experiment, located at Gran Sasso Underground Laboratory, is presented. The experiment looked appearance CNGS neutrino beam using data collected 2008 and 2009. Data are compatible with non-oscillation hypothesis three-flavour mixing model. further analysis same constrains non-standard oscillation parameters θ new $ \varDelta m_{\mathrm{new}}^2 suggested by LSND MiniBooNE experiments. For large values ( > 0.1 eV 2 ),...
We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring sidereal time dependence events, is first test invariance using reactor-based source. No variation data and disappearance results are consistent independent oscillations. Under Standard-Model Extension, we set limits on 14 violating coefficients associated transitions between tau flavor, two competitive muon flavor.
Precision measurements of solar neutrinos emitted by specific nuclear reaction chains in the Sun are great interest for developing an improved understanding star formation and evolution. Given expected neutrino fluxes known detection reactions, such require detectors capable collecting neutrino-electron scattering data exposures on order 1 ktonne yr, with good energy resolution extremely low background. Two-phase liquid argon time projection chambers (LAr TPCs) under development direct Dark...
The OPERA experiment is searching for nu_mu -> nu_tau oscillations in appearance mode i.e. via the direct detection of tau leptons charged current interactions. evidence has been previously reported with three candidate events using a sub-sample data from 2008-2012 runs. We report here fourth event, decaying into hadron, found after adding 2012 run without any muon final state to sample. Given number analysed and low background, are established significance 4.2sigma.
Nuclear recoil events produced by neutron scatters form one of the most important classes background in WIMP direct detection experiments, as they may produce nuclear recoils that look exactly like interactions. In DarkSide-50, we both actively suppress and measure rate neutron-induced using our veto, composed a boron-loaded liquid scintillator detector within water Cherenkov detector. This paper is devoted to description veto system including structure, fundamentals event reconstruction...
The genie neutrino Monte Carlo describes neutrino-induced hadronization with an effective model, known as Andreopoulos-Gallagher-Kehayias-Yang (agky), which is interfaced pythia at high invariant mass. Only the low-mass agky model parameters were extracted from hadronic shower data FNAL 15 ft and BEBC experiments. In this paper, first tune on averaged charged multiplicity deuterium hydrogen bubble chamber experiments presented, a complete estimation of parameter uncertainties. A partial...
The ENUBET project recently concluded the R&D for a site independent design of monitored neutrino beam high precision cross section measurements, in which flux is inferred from measurement charged leptons an instrumented decay tunnel. In this phase three fundamental results were obtained and will be discussed here: 1) beamline not requiring horn relying on static focusing elements allows to perform $\nu_e$ DUNE energy range with 1% statistical uncertainty employing $10^{20}$ 400 GeV protons...