scholarly journals Erratum: Tests of the standard model in neutron beta decay with polarized electrons and unpolarized neutrons and protons [Phys. Rev. D 99 , 053004 (2019)]

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
A. N. Ivanov ◽  
R. Höllwieser ◽  
N. I. Troitskaya ◽  
M. Wellenzohn ◽  
Ya. A. Berdnikov
Keyword(s):  
Standard Model ◽  
Beta Decay ◽  
Polarized Electrons ◽  
Neutron Beta Decay ◽  
The Standard Model

scholarly journals Tests of the standard model in neutron beta decay with polarized electrons and unpolarized neutrons and protons

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
A. N. Ivanov ◽  
R. Höllwieser ◽  
N. I. Troitskaya ◽  
M. Wellenzohn ◽  
Ya. A. Berdnikov
Keyword(s):  
Standard Model ◽  
Beta Decay ◽  
Polarized Electrons ◽  
Neutron Beta Decay ◽  
The Standard Model

scholarly journals Theoretical description of the neutron beta decay in the standard model at the level of 10−5

2021 ◽  
Vol 104 (3) ◽  
Author(s):  
A. N. Ivanov ◽  
R. Höllwieser ◽  
N. I. Troitskaya ◽  
M. Wellenzohn ◽  
Ya. A. Berdnikov
Keyword(s):  
Standard Model ◽  
Beta Decay ◽  
Theoretical Description ◽  
Neutron Beta Decay ◽  
The Standard Model

scholarly journals NoMoS: An R × B drift momentum spectrometer for beta decay studies

2019 ◽  
Vol 219 ◽  
pp. 04003 ◽  
Author(s):  
Daniel Moser ◽  
Hartmut Abele ◽  
Joachim Bosina ◽  
Harald Fillunger ◽  
Torsten Soldner ◽  
...  
Keyword(s):  
Standard Model ◽  
Angular Correlation ◽  
Beta Decay ◽  
Particle Physics ◽  
Correlation Coefficients ◽  
New Physics ◽  
Interference Term ◽  
Free Neutron ◽  
The Standard Model ◽  
Momentum Spectra

The beta decay of the free neutron provides several probes to test the Standard Model of particle physics as well as to search for extensions thereof. Hence, multiple experiments investigating the decay have already been performed, are under way or are being prepared. These measure the mean lifetime, angular correlation coefficients or various spectra of the charged decay products (proton and electron). NoMoS, the neutron decay products mo___mentum spectrometer, presents a novel method of momentum spectroscopy: it utilizes the R ×B drift effect to disperse charged particles dependent on their momentum in an uniformly curved magnetic field. This spectrometer is designed to precisely measure momentum spectra and angular correlation coefficients in free neutron beta decay to test the Standard Model and to search for new physics beyond. With NoMoS, we aim to measure inter alia the electron-antineutrino correlation coefficient a and the Fierz interference term b with an ultimate precision of Δa/a < 0.3% and Δb < 10−3 respectively. In this paper, we present the measurement principles, discuss measurement uncertainties and systematics, and give a status update.

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