A5008351653- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Planetary Science and Exploration
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Gyrotron and Vacuum Electronics Research
- Medical Imaging Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Computational Physics and Python Applications
- Atomic and Molecular Physics
- Geotechnical and Geomechanical Engineering
- Scientific Research and Discoveries
- Photocathodes and Microchannel Plates
- Plasma Diagnostics and Applications
- Advanced Semiconductor Detectors and Materials
Laboratoire AstroParticule et Cosmologie
2014-2025
Université Paris Cité
2016-2025
Agence Parisienne du Climat
2018-2024
Centre National de la Recherche Scientifique
2015-2024
Sorbonne Paris Cité
2012-2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2022
Institut de Recherche sur les Lois Fondamentales de l'Univers
2012-2022
Délégation Paris 7
2012-2019
Kiel University
2019
University of St Andrews
2019
The Double Chooz experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. An observed-to-predicted ratio events 0.944±0.016(stat)±0.040(syst) was obtained in 101 days running at the nuclear power plant France, two 4.25 GW(th) reactors. results were from a single 10 m(3) fiducial volume detector located 1050 m cores. flux prediction used Bugey4 measurement after correction for differences core composition. deficit can be...
The Double Chooz experiment has observed 8249 candidate electron antineutrino events in 227.93 live days with 33.71 GW-ton-years ($\mathrm{\text{reactor power}}\ifmmode\times\else\texttimes\fi{}\mathrm{\text{detector mass}}\ifmmode\times\else\texttimes\fi{}\mathrm{\text{live time}}$) exposure using a $10.3\text{ }\text{ }{\mathrm{m}}^{3}$ fiducial volume detector located at 1050 m from the reactor cores of nuclear power plant France. expectation case ${\ensuremath{\theta}}_{13}=0$ is 8937...
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 $$ {\overline{\nu}}_e signal has increased. value is measured be sin2 2θ = 0.090 − 0.029 +...
The ZEPLIN-III experiment in the Palmer Underground Laboratory at Boulby uses a 12 kg two-phase xenon time-projection chamber to search for weakly interacting massive particles (WIMPs) that may account dark matter of our Galaxy. detector measures both scintillation and ionization produced by radiation liquid differentiate between nuclear recoils expected from WIMPs electron-recoil background signals down $\ensuremath{\sim}10\text{ }\text{ }\mathrm{keV}$ nuclear-recoil energy. An analysis...
We present the potential sensitivity of a future recoil detector for first detection process coherent elastic neutrino nucleus scattering (CEνNS). use Chooz reactor complex in France as our luminous source neutrinos. Leveraging ability to cleanly separate rate correlated with thermal power against (uncorrelated) backgrounds, we show that 10 kg cryogenic bolometric array 100 eV threshold should be able extract CEνNS signal within one year running.
The Double Chooz experiment has determined the value of neutrino oscillation parameter $\theta_{13}$ from an analysis inverse beta decay interactions with neutron capture on hydrogen. This uses a three times larger fiducial volume than standard assessment, which is restricted to region doped gadolinium (Gd), yielding exposure 113.1 GW-ton-years. data sample used in this distinct that Gd analysis, and systematic uncertainties are also largely independent, some exceptions, such as reactor flux...
The Double Chooz collaboration presents a measurement of the neutrino mixing angle θ 13 using reactor $$ \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...
The next generation neutrino observatory proposed by the LBNO collaboration will address fundamental questions in particle and astroparticle physics. experiment consists of a far detector, its first stage 20 kt LAr double phase TPC magnetised iron calorimeter, situated at 2300 km from CERN near detector based on highpressure argon gas TPC. long baseline provides unique opportunity to study flavour oscillations over their 1st 2nd oscillation maxima exploring L/E behaviour, distinguishing...
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.
A liquid argon time projection chamber, constructed for the Argon Response to Ionization and Scintillation (ARIS) experiment, has been exposed highly collimated quasi-monoenergetic LICORNE neutron beam at Institute de Physique Nuclaire Orsay in order study scintillation response nuclear electronic recoils. An array of scintillator detectors, arranged around apparatus, tag scattered neutrons select recoil energies [7, 120] keV energy range. The relative efficiency recoils was measured high...
Results of observations low energy nuclear and electron recoil events in liquid xenon scintillator detectors are given. The relative scintillation efficiency for recoils is 0.22±0.01 the range 40–70 keV. Under assumption a single dominant decay component to pulse shape log-normal mean parameter T0 maximum likelihood estimator time constant 6 keV <Eee<30 equal 21.0±0.5 ns. It observed that rises slowly with energy, having value ∼30 ns at Eee∼15 Electron shapes found be well fitted by...
We present new experimental constraints on the WIMP-nucleon spin-dependent elastic cross sections using data from first science run of ZEPLIN-III, a two-phase xenon experiment searching for galactic dark matter weakly interacting massive particles based at Boulby mine. Analysis ∼450 kg·days fiducial exposure allow us to place 90%-confidence upper limit pure WIMP-neutron section σn=1.9×10−2 pb 55 GeV/c2 WIMP mass. Recent calculations nuclear spin structure Bonn charge-dependent...
In June 2012, an Expression of Interest for a long-baseline experiment (LBNO) has been submitted to the CERN SPSC. LBNO considers three types neutrino detector technologies: double-phase liquid argon (LAr) TPC and magnetised iron as far detectors. For near detector, high-pressure gas embedded in calorimeter magnet is baseline design. A mandatory milestone concrete prototyping effort towards envisioned large-scale detectors, accompanying campaign measurements aimed at assessing associated...
The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated reactor-on data. In this analysis, we present a background-model-independent measurement of mixing angle θ13 including 7.53 days reactor-off A global fit observed antineutrino rates for different reactor power conditions is performed, yielding both total rate. are improved significantly data fit, as it provides direct This rate modulation analysis considers candidates...
A 10 kilo-tonne dual-phase liquid argon TPC is one of the detector options considered for Deep Underground Neutrino Experiment (DUNE). The technology relies on amplification ionisation charge in ultra-pure vapour and offers several advantages compared to traditional single-phase TPCs. 4.2 tonne prototype, largest its kind, with an active volume \three has been constructed operated at CERN. In this paper we describe detail experimental setup components as well report operation experience. We...
We present limits on the WIMP-nucleon cross section for inelastic dark matter derived from 2008 run of ZEPLIN-III. Cuts, notably scintillation pulse shape and scintillation-to-ionisation ratio, give a net exposure 63 kg.days in range 20-80keV nuclear recoil energy, which 6 events are observed. Upper signal rate maximum empty patch data. Under standard halo assumptions small region parameter space consistent, at 99% CL, with causing 1.17 ton.year DAMA modulation is allowed 90% CL: it mass...