O. Naviliat-Cuncic
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View article: Backscattering Study of Electrons from 0.1 to 3.4 MeV
Backscattering Study of Electrons from 0.1 to 3.4 MeV Open
Benchmarking simulation codes for electron transport and scattering in matter is a crucial step for estimating uncertainties in many applications. However, experimental data for electron energies of a few MeV is scarce to make such compari…
View article: Generating a highly uniform magnetic field inside the magnetically shielded room of the n2EDM experiment
Generating a highly uniform magnetic field inside the magnetically shielded room of the n2EDM experiment Open
View article: Comments on the publication "Discrete symmetries tested at 10e-4 precision using linear polarization of photons from positronium annihilations" by P. Moskal et al
Comments on the publication "Discrete symmetries tested at 10e-4 precision using linear polarization of photons from positronium annihilations" by P. Moskal et al Open
The authors of Ref.[1] (referred to here as "Moskal et al.") claim to have performed the most precise test of P, T and CP invariance in the decay of ortho-Positronium. In this note: 1) we demonstrate, assuming standard properties for Compt…
View article: Search for a Neutron Dark Decay in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>He</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Search for a Neutron Dark Decay in Open
Neutron dark decays have been suggested as a solution to the discrepancy between bottle and beam experiments, providing a dark matter candidate that can be searched for in halo nuclei. The free neutron in the final state following the deca…
View article: Achieving ultra-low and -uniform residual magnetic fields in a very large magnetically shielded room for fundamental physics experiments
Achieving ultra-low and -uniform residual magnetic fields in a very large magnetically shielded room for fundamental physics experiments Open
View article: A large ‘Active Magnetic Shield’ for a high-precision experiment
A large ‘Active Magnetic Shield’ for a high-precision experiment Open
We present a novel Active Magnetic Shield (AMS), designed and implemented for the n2EDM experiment at the Paul Scherrer Institute. The experiment will perform a high-sensitivity search for the electric dipole moment of the neutron. Magneti…
View article: Search for Neutron-to-Hidden-Neutron Oscillations in an Ultracold Neutron Beam
Search for Neutron-to-Hidden-Neutron Oscillations in an Ultracold Neutron Beam Open
Models that postulate the existence of hidden sectors address contemporary questions, such as the source of baryogenesis and the nature of dark matter. Neutron-to-hidden-neutron oscillations are among the possible mixing processes and have…
View article: Achieving ultra-low and -uniform residual magnetic fields in a very large magnetically shielded room for fundamental physics experiments
Achieving ultra-low and -uniform residual magnetic fields in a very large magnetically shielded room for fundamental physics experiments Open
High-precision searches for an electric dipole moment of the neutron (nEDM) require stable and uniform magnetic field environments. We present the recent achievements of degaussing and equilibrating the magnetically shielded room (MSR) for…
View article: Superallowed decays within and beyond the standard model
Superallowed decays within and beyond the standard model Open
View article: Report on 2212.02403v1
Report on 2212.02403v1 Open
Ultra-low-mass axions are a viable dark matter candidate and may form a coherently oscillating classical field.Nuclear spins in experiments on Earth might couple to this oscillating axion dark-matter field, when propagating on Earth's traj…
View article: Precision measurements in the beta decay of <sup>6</sup>He
Precision measurements in the beta decay of <sup>6</sup>He Open
We report here about the ongoing data analysis of an experiment performed at GANIL with a 25 keV 6 He + beam to determine the Fierz interference term from the β particles energy spectrum.
View article: Search for CP-Violation in ortho-Positronium Decay
Search for CP-Violation in ortho-Positronium Decay Open
We report here on the design and development of a new apparatus aiming at a 10-fold improved search for CP-violation in ortho-Positronium decay to be performed at the Facility for Rare Isotope Beams.
View article: Publisher’s Note: “The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements” [Rev. Sci. Instrum. 93, 095105 (2022)]
Publisher’s Note: “The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements” [Rev. Sci. Instrum. 93, 095105 (2022)] Open
status: Published
View article: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>-Nuclear-Recoil Correlation from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>He</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> Decay in a Laser Trap
-Nuclear-Recoil Correlation from Decay in a Laser Trap Open
We report the first precise measurement of a β-recoil correlation from a radioactive noble gas (^{6}He) confined via a magneto-optical trap. The measurement is motivated by the search for exotic tensor-type contributions to the charged wea…
View article: High-precision measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>He</mml:mi><mml:mprescripts/><mml:none/><mml:mn>6</mml:mn></mml:mmultiscripts></mml:math> half-life
High-precision measurement of the half-life Open
The half-life of $^6$He has been measured using a low-energy radioactive beam implanted in an YAlO$_3$ Ce-doped inorganic scintillator and recording decay events in a $4π$ geometry. Events were time-stamped with a digital data acquisition …
View article: Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment
Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment Open
Experiments dedicated to the measurement of the electric dipole moment of the\nneutron require outstanding control of the magnetic field uniformity. The\nneutron electric dipole moment (nEDM) experiment at the Paul Scherrer Institute\nuses…
View article: The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements
The very large n2EDM magnetically shielded room with an exceptional performance for fundamental physics measurements Open
We present the magnetically shielded room (MSR) for the n2EDM experiment at the Paul Scherrer Institute, which features an interior cubic volume with each side of length 2.92 m, thus providing an accessible space of 25 m3. The MSR has 87 o…
View article: The `n2EDM MSR' -- a very large magnetically shielded room with an exceptional performance for fundamental physics measurements
The `n2EDM MSR' -- a very large magnetically shielded room with an exceptional performance for fundamental physics measurements Open
We present the magnetically shielded room (MSR) for the n2EDM experiment at the Paul Scherrer Institute which features an interior cubic volume with each side of length 2.92m, thus providing an accessible space of 25m3. The MSR has 87 open…
View article: $n-n'$ Oscillations: Sensitivity of a first UCN beam experiment
$n-n'$ Oscillations: Sensitivity of a first UCN beam experiment Open
Oscillations of the neutron into a hidden sector particle are processes predicted in various Standard Model extensions. This extra channel for neutron disappearance has not been tested experimentally in large portions of the oscillation pa…
View article: GANIL / SPIRAL - 2001-2007 - Achievements, Highlights and Perspectives
GANIL / SPIRAL - 2001-2007 - Achievements, Highlights and Perspectives Open
Since the early eighties, the intermediate energy ion beams of the GANIL facility and the associated equipments have played a pioneer role in the emergence of new fields in Nuclear Physics based on the production of exotic nuclei in unknow…
View article: Erratum to: Data blinding for the nEDM experiment at PSI
Erratum to: Data blinding for the nEDM experiment at PSI Open
View article: The design of the n2EDM experiment: nEDM Collaboration
The design of the n2EDM experiment: nEDM Collaboration Open
We present the design of a next-generation experiment, n2EDM, currently under construction at the ultracold neutron source at the Paul Scherrer Institute (PSI) with the aim of carrying out a high-precision search for an electric dipole mom…
View article: Johnson-Nyquist noise effects in neutron electric-dipole-moment experiments
Johnson-Nyquist noise effects in neutron electric-dipole-moment experiments Open
Magnetic Johnson-Nyquist noise (JNN) originating from metal electrodes, used\nto create a static electric field in neutron electric-dipole-moment (nEDM)\nexperiments, may limit the sensitivity of measurements. We present here the\nfirst de…
View article: Data blinding for the nEDM experiment at PSI
Data blinding for the nEDM experiment at PSI Open
View article: Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment
Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment Open
Experiments dedicated to the measurement of the electric dipole moment of the neutron require outstanding control of the magnetic field uniformity. The neutron electric dipole moment (nEDM) experiment at the Paul Scherrer Institute uses a …
View article: A search for neutron to mirror-neutron oscillations using the nEDM apparatus at PSI
A search for neutron to mirror-neutron oscillations using the nEDM apparatus at PSI Open
View article: Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment
Optically pumped Cs magnetometers enabling a high-sensitivity search for the neutron electric dipole moment Open
An array of 16 laser-pumped scalar Cs magnetometers was part of the neutron electric dipole moment (nEDM) experiment taking data at the Paul Scherrer Institute in 2015 and 2016. It was deployed to measure the gradients of the experiment's …
View article: Measurement of the Permanent Electric Dipole Moment of the Neutron
Measurement of the Permanent Electric Dipole Moment of the Neutron Open
We present the result of an experiment to measure the electric dipole moment (EDM) of the neutron at the Paul Scherrer Institute using Ramsey's method of separated oscillating magnetic fields with ultracold neutrons. Our measurement stands…
View article: Precision Beta Decay as a Probe of New Physics
Precision Beta Decay as a Probe of New Physics Open
The document presents a summary of discussions at recent workshops at the Amherst Center for Fundamental Interactions at Amherst, MA, and at the European Centre for Theoretical Studies in Nuclear Physics and Related Areas at Trento, Italy,…
View article: Precision Beta Decay as a Probe of New Physics
Precision Beta Decay as a Probe of New Physics Open
The document presents a summary of discussions at recent workshops at the Amherst Center for Fundamental Interactions at Amherst, MA, and at the European Centre for Theoretical Studies in Nuclear Physics and Related Areas at Trento, Italy,…