A5102975196- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Dark Matter and Cosmic Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced NMR Techniques and Applications
- Nuclear reactor physics and engineering
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Advanced MRI Techniques and Applications
- Radioactive Decay and Measurement Techniques
- Advanced Chemical Physics Studies
- Cold Fusion and Nuclear Reactions
- Noncommutative and Quantum Gravity Theories
Institute of Physics
2016-2025
Jagiellonian University
2016-2025
Institute of Nuclear Physics, Polish Academy of Sciences
2013-2022
North Carolina State University
2022
KU Leuven
2010-2022
Johannes Gutenberg University Mainz
2022
Institut Laue-Langevin
2022
Paul Scherrer Institute
2005-2017
Centre National de la Recherche Scientifique
2010-2017
École Nationale Supérieure d'Ingénieurs de Caen
2010-2017
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...
We report on a search for ultralow-mass axionlike dark matter by analyzing the ratio of spin-precession frequencies stored ultracold neutrons and 199Hg atoms an axion-induced oscillating electric dipole moment neutron axion-wind effect. No signal consistent with is observed axion mass range 10−24≤ma≤10−17 eV. Our null result sets first laboratory constraints coupling to gluons, which improve astrophysical limits up 3 orders magnitude, also improves previous nucleons factor 40.Received 29...
A fully analytical description of the allowed $\beta$ spectrum shape is given in view ongoing and planned measurements. Its study forms an invaluable tool search for physics beyond standard electroweak model weak magnetism recoil term. Contributions stemming from finite size corrections, mass effects, radiative corrections are reviewed. particular focus placed on atomic chemical where existing extended analytically provided. The effects QCD-induced terms discussed, cross-checks were...
The precision of correlation measurements in neutron and nuclear $\ensuremath{\beta}$ decay has now reached the level about 1% better. At this precision, higher-order corrections such as recoil-order induced by strong interaction radiative cannot necessarily be neglected anymore. We provide here an update $\mathcal{F}t$ values isospin $T=1/2$ mirror decays including neutron, interest to determine ${V}_{\mathrm{ud}}$ quark-mixing matrix element. also overview current experimental theoretical...
High-precision cross-section data of the deuteron-proton breakup reaction at 130 MeV are presented for 72 kinematically complete configurations. The cover a large region available phase space, divided into systematic grid kinematical variables. They compared with theoretical predictions, in which full dynamics three-nucleon (3N) system is obtained three different ways: realistic nucleon-nucleon (NN) potentials combined model 3N forces (3NF's) or an effective 3NF resulting from explicit...
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%...
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...
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...
High precision cross-section data of the deuteron-proton breakup reaction at 130 MeV deuteron energy are compared with theoretical predictions obtained a coupled-channel extension CD Bonn potential virtual Delta-isobar excitation, without and inclusion long-range Coulomb force. The effect is studied on basis set, extended in this work to about 1500 points by including geometries characterized small polar angles two protons. experimental clearly prefer interaction included. strongest effects...
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...
High-precision data for vector and tensor analyzing powers the $^{1}\mathrm{H}$$(\mathrm{dP\vec},\mathit{pp})n$ reaction at a 130-MeV deuteron beam energy have been measured over large part of phase space. Theoretical predictions based on various approaches to describe three nucleon ($3N$) system reproduce very well power no three-nucleon force effect is observed these observables. Tensor are also reproduced by calculations in almost whole studied region, but locally certain discrepancies...
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
While the international nEDM collaboration at Paul Scherrer Institut (PSI) took data in 2017 that covered a considerable fraction of parameter space claimed potential signals hypothetical neutron (n) to mirror-neutron (n′) transitions, it could not test all signal regions various mirror magnetic fields. Therefore, new study n−n′ oscillations using stored ultracold neutrons (UCNs) is underway PSI, considerably expanding reach fields (B′) and oscillation time constants (τnn′). The apparatus...
High precision vector and tensor analyzing power data of the deuteron-proton elastic scattering at 130 MeV deuteron beam energy have been measured in a large range angles. They are compared with theoretical predictions obtained various approaches: realistic potentials for pure $\mathit{NN}$ interactions, inclusion three-nucleon force, framework chiral perturbation theory. All calculations describe roughly main features distributions, but none them can reproduce all their details. This...
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).