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View article: Fundamental Nuclear and Particle Physics At Neutron Sources
Fundamental Nuclear and Particle Physics At Neutron Sources Open
Fundamental neutron and neutrino physics at neutron sources, combining precision measurements and theory, can probe new physics at energy scales well beyond the highest energies probed by the LHC and possible future high energy collider fa…
View article: Fundamental Neutron Physics: a White Paper on Progress and Prospects in the US
Fundamental Neutron Physics: a White Paper on Progress and Prospects in the US Open
Fundamental neutron physics, combining precision measurements and theory, probes particle physics at short range with reach well beyond the highest energies probed by the LHC. Significant US efforts are underway that will probe BSM CP viol…
View article: Projection imaging with ultracold neutrons
Projection imaging with ultracold neutrons Open
Ultracold neutron (UCN) projection imaging is demonstrated using a boron-coated back-illuminated CCD camera and the Los Alamos UCN source. Each neutron is recorded through the capture reactions with10B. By direct detection at least one of …
View article: Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment
Improved limits on Fierz interference using asymmetry measurements from the Ultracold Neutron Asymmetry (UCNA) experiment Open
The Ultracold Neutron Asymmetry (UCNA) experiment was designed to measure the β-decay asymmetry parameter, A0, for free neutron decay. In the experiment, polarized ultracold neutrons are transported into a decay trap, and their β-decay ele…
View article: A new cryogenic apparatus to search for the neutron electric dipole moment
A new cryogenic apparatus to search for the neutron electric dipole moment Open
© 2019 IOP Publishing Ltd and Sissa Medialab. A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with a major improvement in sensitivity compared to the existing limit in the search for a neutron Electric Dipole Mo…
View article: Search for neutron dark decay: <i>n</i> → χ + <i>e</i><sup>+</sup><i>e</i><sup>−</sup>
Search for neutron dark decay: <i>n</i> → χ + <i>e</i><sup>+</sup><i>e</i><sup>−</sup> Open
In January, 2018, Fornal and Grinstein proposed that a previously unobserved neutron decay branch to a dark matter particle (χ) could account for the discrepancy in the neutron lifetime observed in two different types of experiments. One o…
View article: Final results for the neutron <b>β</b>-asymmetry parameter <i>A</i><sub><b>0</b></sub> from the UCNA experiment
Final results for the neutron <b>β</b>-asymmetry parameter <i>A</i><sub><b>0</b></sub> from the UCNA experiment Open
The UCNA experiment was designed to measure the neutron β-asymmetry parameter A 0 using polarized ultracold neutrons (UCN). UCN produced via downscattering in solid deuterium were polarized via transport through a 7 T magnetic field, and t…
View article: Publisher's Note: First direct constraints on Fierz interference in free-neutron <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> decay [Phys. Rev. C 96, 042501(R) (2017)]
Publisher's Note: First direct constraints on Fierz interference in free-neutron decay [Phys. Rev. C 96, 042501(R) (2017)] Open
Received 3 November 2017DOI:https://doi.org/10.1103/PhysRevC.96.059901©2017 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBeta decayElectroweak interactionElectroweak interactions in nuclear physicsExtensions of fe…
View article: First direct constraints on Fierz interference in free-neutron <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> decay
First direct constraints on Fierz interference in free-neutron decay Open
Precision measurements of free-neutron β decay have been used to precisely constrain our understanding of the weak interaction. However, the neutron Fierz interference term bn, which is particularly sensitive to beyond-standard-model tenso…
View article: Neutron decay correlations in the Nab experiment
Neutron decay correlations in the Nab experiment Open
The Nab experiment will measure the correlation a between the momenta of the beta particle and antineutrino in neutron decay as well as the Fierz term b which distorts the beta spectrum.