O. Naviliat-Cuncic
A5041903867- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Radioactive Decay and Measurement Techniques
- Radiation Detection and Scintillator Technologies
- Advanced NMR Techniques and Applications
- Advanced Frequency and Time Standards
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Advanced Chemical Physics Studies
- Mass Spectrometry Techniques and Applications
- Muon and positron interactions and applications
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Advanced MRI Techniques and Applications
- High-Energy Particle Collisions Research
- Astronomical and nuclear sciences
École Nationale Supérieure d'Ingénieurs de Caen
2015-2025
Centre National de la Recherche Scientifique
2015-2025
Université de Caen Normandie
2014-2025
Normandie Université
2016-2024
National Superconducting Cyclotron Laboratory
2011-2023
Michigan State University
2011-2023
Laboratoire de Physique Corpusculaire de Caen
2009-2023
Institut National de Physique Nucléaire et de Physique des Particules
2007-2023
University of Sussex
2020
Astronomy and Space
1994-2018
We present the result of an experiment to measure electric dipole moment (EDM) neutron at Paul Scherrer Institute using Ramsey's method separated oscillating magnetic fields with ultracold neutrons (UCN). Our measurement stands in long history EDM experiments probing physics violating time reversal invariance. The salient features this were use a Hg-199 co-magnetometer and array optically pumped cesium vapor magnetometers cancel correct for field changes. statistical analysis was performed...
We present for the first time a detailed and comprehensive analysis of experimental results that set current world sensitivity limit on magnitude electric dipole moment (EDM) neutron. have extended enhanced our earlier to include recent developments in understanding effects gravity depolarizing ultracold neutrons (UCN); an improved calculation spectrum neutrons; conservative estimates other possible systematic errors, which are also shown be consistent with more measurements undertaken...
The current status of precision measurements in allowed nuclear beta decay is reviewed, including neutron decay, with emphasis on their potential to look for new physics beyond the standard electroweak model. Experimental results are interpreted framework phenomenological model-independent descriptions as well some specific extensions values couplings and constraints exotic general Hamiltonian updated. ratio between axial vector obtained...
A bstract Precision measurements in allowed nuclear beta decays and neutron decay are reviewed analyzed both within the Standard Model looking for new physics. The analysis incorporates most recent experimental theoretical developments. results interpreted terms of Wilson coefficients describing effective interactions between leptons nucleons (or quarks) that responsible decay. New global fits performed incorporating a comprehensive list precision decay, superallowed 0 + → transitions, other...
The Vud element of the Cabibbo-Kobayashi-Maskawa quark mixing matrix has traditionally been determined from analysis data in nuclear superallowed 0+ to transitions, neutron decay and pion beta decay. We show here that this can independently be mirror transitions. extracted value, |Vud| = 0.9719 +- 0.0017, is at 1.2 combined standard deviations value obtained transitions a similar precision than experiments. discuss some prospects improve its through experiments
In case a mirror world with copy of our ordinary particle spectrum would exist, the neutron n and its degenerate partner, n', could potentially mix undergo nn' oscillations. The interaction an magnetic field lift degeneracy between partners, diminish n' amplitude in wave function and, thus, suppress observability. We report experimental comparison ultracold storage trap without superimposed field. No influence is found assuming negligible fields, limit on oscillation time taunn' > 103 s (95%...
Precision measurements in nuclear β decay provide sensitive means to test the structure of standard electroweak model; they also allow determination fundamental properties processes that involve lightest quarks. The primary aim such tests is find deviations from Standard Model predictions may indicate new physics. We review here status precision decay, including selected experiments neutron and discuss recent results developments. Among these developments are consideration mirror transitions...
A clock comparison experiment, analyzing the ratio of spin precession frequencies stored ultracold neutrons and 199Hg atoms, is reported. No daily variation this could be found, from which set an upper limit on Lorentz invariance violating cosmic anisotropy field b perpendicular < 2 x 10(-20) eV (95% C.L.). This first for free neutron. result also interpreted as a direct gravitational dipole moment neutron |gn| 0.3 eV/c2 m spin-dependent interaction with Sun. Analyzing Earth, based previous...
Precision measurements in nuclear β decay offer a sensitive window to search for new physics beyond the standard electroweak model. Searches are also strong motivation experiments carried out at high energy frontier. It is instructive confront results from low and frontiers order look possible complementarities. This paper reviews constraints on obtained neutron decays compares them those other semi‐leptonic processes LHC. The sensitivity requirements of precision decay, impact light current...
It has been proposed that there could be a mirror copy of the standard model particles, restoring parity symmetry in weak interaction on global level. Oscillations between neutral particle, such as neutron, and its counterpart potentially answer various standing issues physics today. Astrophysical studies terrestrial experiments led by ultracold neutron storage measurements have investigated to mirror-neutron oscillations imposed constraints theoretical parameters. Recently, further analysis...
We present the design of a next-generation experiment, n2EDM, currently under construction at ultracold neutron source Paul Scherrer Institute (PSI) with aim carrying out high-precision search for an electric dipole moment neutron. The project builds on experience gained previous apparatus operated PSI until 2017, and is expected to deliver order magnitude better sensitivity provision further substantial improvements. An overview experimental method setup given, requirements are derived, its...
Abstract High-precision searches for an electric dipole moment of the neutron (nEDM) require stable and uniform magnetic field environments. We present recent achievements degaussing equilibrating magnetically shielded room (MSR) n2EDM experiment at Paul Scherrer Institute. final configuration that will be used after numerous studies. The optimized procedure results in a residual has been reduced by factor two. ultra-low is achieved with full magnetic-field-coil system, large vacuum vessel...
We present a coil system designed to generate highly uniform magnetic field for the n2EDM experiment at Paul Scherrer Institute. It consists of main B0 and set auxiliary coils mounted on cubic structure with side length 273cm , inside large magnetically shielded room (MSR). have assembled this characterized its performances mapping robot. The apparatus is able 1μT vertical relative root mean square deviation σ(Bz)/Bz=3×10-5 over volume interest, cylinder radius 40cm height 30cm . This level...
We performed ultracold neutron storage measurements to search for additional losses due (n) mirror-neutron (n′) oscillations as a function of an applied magnetic field B. In the presence mirror B′, would be maximal B≈B′. did not observe any indication nn′ and placed lower limit on oscillation time τnn′>12.0 s at 95% C.L. B′ between 0 12.5 μT.Received 26 May 2009DOI:https://doi.org/10.1103/PhysRevD.80.032003©2009 American Physical Society
The measurement of the neutron electric dipole moment (nEDM) constrains contribution CP-violating terms within both Standard Model and its extensions. experiment uses ultracold neutrons (UCN) stored in vacuum at room temperature. This technique provided last (and best) limit by RAL/Sussex/ILL collaboration 2006: dn < 2:9 × 10-26 e cm (90% C.L.). We aim to improve experimental sensitivity a factor 5 2-3 years, using an upgrade same apparatus. will take advantage increased density Paul...
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The electron shakeoff probability of $^{6}\mathrm{Li}^{2+}$ ions resulting from the ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay $^{6}\mathrm{He}^{+}$ has been measured with high precision using a specially designed recoil ion spectrometer. This is first measurement pure following nuclear $\ensuremath{\beta}$ decay, not affected by multielectron processes such as Auger cascades. In this ideal textbook case for application sudden approximation, experimental ionization was found to be...
We present a magnetometer based on optically pumped Cs atoms that measures the magnitude and direction of 1 μT magnetic field. Multiple circularly polarized laser beams were used to probe free spin precession atoms. The design was optimized for long-time stability achieves scalar resolution better than 300 fT integration times ranging from 80 ms 1000 s. best less reached with 1.6 6 able measure field 10 μrad s up 2000
We demonstrate that abundant quantities of short-lived beta unstable ions can be trapped in a novel transparent Paul trap and their decay products directly detected coincidence. Low energy 6He+ (807 ms half-life) were extracted from the SPIRAL source at GANIL, then decelerated, cooled, bunched by means buffer gas cooling technique. More than 10(8) have been stored over measuring period six days, about 10(5) coincidences between particles 6Li++ recoiling recorded. The technique extended to...
Both components of the transverse polarization electrons (sigmaT1, sigmaT2) emitted in beta-decay polarized, free neutrons have been measured. The T-odd, P-odd correlation coefficient quantifying sigmaT2, perpendicular to neutron and electron momentum, was found be R=0.008+/-0.015+/-0.005. This value is consistent with time reversal invariance significantly improves limits on relative strength imaginary scalar couplings weak interaction. obtained for associated sigmaT1,...
The final analysis of the experiment determining both components transverse polarization electrons ($\sigma_{T_{1}}$, $\sigma_{T_{2}}$) emitted in $\beta$-decay polarized, free neutrons is presented. T-odd, P-odd correlation coefficient quantifying $\sigma_{T_{2}}$, perpendicular to neutron and electron momentum, was found be $R=$ 0.004$\pm0.012\pm$0.005. This value consistent with time reversal invariance, significantly improves earlier result limits on relative strength imaginary scalar...
The neutron gyromagnetic ratio has been measured relative to that of the 199Hg atom with an uncertainty 0.8 ppm. We employed apparatus where ultracold neutrons and mercury atoms are stored in same volume report result γn/γHg=3.8424574(30).