scholarly journals Corrections of order O(Ee2∕mN2), caused by weak magnetism and proton recoil, to the neutron lifetime and correlation coefficients of the neutron beta decay

2021 ◽  
pp. 103806
Author(s):  
A.N. Ivanov ◽  
R. Höllwieser ◽  
N.I. Troitskaya ◽  
M. Wellenzohn ◽  
Ya.A. Berdnikov
Keyword(s):  
Beta Decay ◽  
Correlation Coefficients ◽  
Neutron Lifetime ◽  
Neutron Beta Decay ◽  
Weak Magnetism ◽  
Proton Recoil

The mathematical modeling of the experiment on the determination of correlation coefficients in neutron beta-decay

2018 ◽  
Author(s):  
A. P. Serebrov ◽  
O. M. Zherebtsov ◽  
G. N. Klyushnikov
Keyword(s):  
Mathematical Modeling ◽  
Beta Decay ◽  
Correlation Coefficients ◽  
Neutron Beta Decay

scholarly journals On the Free Neutron Decay with Neutrino(s) Interactions

2019 ◽  
Author(s):  
Muhammad Ali
Keyword(s):  
Beta Decay ◽  
Cross Sections ◽  
Neutron Decay ◽  
Mathematical Framework ◽  
Neutron Lifetime ◽  
Discrete Energy ◽  
Neutron Beta Decay ◽  
Inverse Beta Decay ◽  
Free Neutron ◽  
Reactor Neutrinos

This paper proposes a mechanism for the decay of free neutron with interactions with neutrino(s). A mathematical framework is developed using canonical ensemble framework for the interactions. Probability distribution of neutron discrete energy states has been derived which is a function of neutrino-zeta – a macroscopic property of neutrinos. Consequently, a relationship between neutron decay constant and probability of neutron beta decay is provided, assuming linear proportionality. Furthermore, qualitative explanation of neutron lifetime puzzle, where discrepancy in lifetime measurements based on measurement method (Bottle vs Beam), is related to neutrino microscopic cross-sections. In addition, inverse beta-decay reaction of proton and beta-negative and beta-positive reaction of radionuclides have been analyzed using the proposed mechanism. The probabilities of beta-negative and beta-positive reactions in nature are qualitatively in agreement with the proposed mechanism. Lastly, way to test the mechanism experimentally with reactor neutrinos and neutrino beams has been presented.

scholarly journals The Nab experiment: A precision measurement of unpolarized neutron beta decay

2019 ◽  
Vol 219 ◽  
pp. 04002 ◽  
Author(s):  
J. Fry ◽  
R. Alarcon ◽  
S. Baeßler ◽  
S. Balascuta ◽  
L. Barrón Palos ◽  
...  
Keyword(s):  
Beta Decay ◽  
Nuclear Physics ◽  
Axial Vector ◽  
Electron Neutrino ◽  
Coupling Constants ◽  
Neutron Lifetime ◽  
Large Area ◽  
Vector Coupling ◽  
Oak Ridge ◽  
Neutron Beta Decay

Neutron beta decay is one of the most fundamental processes in nuclear physics and provides sensitive means to uncover the details of the weak interaction. Neutron beta decay can evaluate the ratio of axial-vector to vector coupling constants in the standard model, λ = gA/gV, through multiple decay correlations. The Nab experiment will carry out measurements of the electron-neutrino correlation parameter a with a precision of δa/a = 10−3 and the Fierz interference term b to δb = 3 × 10−3 in unpolarized free neutron beta decay. These results, along with a more precise measurement of the neutron lifetime, aim to deliver an independent determination of the ratio λ with a precision of δλ/λ = 0.03% that will allow an evaluation of Vud and sensitively test CKM unitarity, independent of nuclear models. Nab utilizes a novel, long asymmetric spectrometer that guides the decay electron and proton to two large area silicon detectors in order to precisely determine the electron energy and an estimation of the proton momentum from the proton time of flight. The Nab spectrometer is being commissioned at the Fundamental Neutron Physics Beamline at the Spallation Neutron Source at Oak Ridge National Lab. We present an overview of the Nab experiment and recent updates on the spectrometer, analysis, and systematic effects.

Spectrum and polarization of electrons in neutron beta-decay in an electromagnetic wave field

1987 ◽  
Vol 30 (3) ◽  
pp. 209-213
Author(s):  
O. F. Dorofeev ◽  
A. E. Lobanov ◽  
O. S. Pavlova ◽  
V. N. Rodionov
Keyword(s):  
Electromagnetic Wave ◽  
Wave Field ◽  
Beta Decay ◽  
Neutron Beta Decay ◽  
Electromagnetic Wave Field

Asymmetry of neutrino emission from neutron beta decay in superdense matter and a strong magnetic field

2006 ◽  
Vol 69 (9) ◽  
pp. 1453-1460 ◽  
Author(s):  
V. L. Kauts ◽  
A. M. Savochkin ◽  
A. I. Studenikin
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Beta Decay ◽  
Neutrino Emission ◽  
Superdense Matter ◽  
Neutron Beta Decay

scholarly journals Determination of the Weak Axial Vector Couplingλ=gA/gVfrom a Measurement of theβ-Asymmetry ParameterAin Neutron Beta Decay

2013 ◽  
Vol 110 (17) ◽  
Author(s):  
D. Mund ◽  
B. Märkisch ◽  
M. Deissenroth ◽  
J. Krempel ◽  
M. Schumann ◽  
...  
Keyword(s):  
Beta Decay ◽  
Axial Vector ◽  
Neutron Beta Decay

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

Beta decay of polarized Λ hyperons III. Correlations in the Λ centre-of-mass system and the proton recoil spectrum

1973 ◽  
Vol 43 (3) ◽  
pp. 237-239 ◽  
Author(s):  
K.H. Althoff ◽  
R.M. Brown ◽  
D. Freytag ◽  
K.S. Heard ◽  
J. Heintze ◽  
...  
Keyword(s):  
Beta Decay ◽  
Centre Of Mass ◽  
Mass System ◽  
Proton Recoil ◽  
Recoil Spectrum

scholarly journals Neutron beta decay studies with Nab

2013 ◽  
Author(s):  
S. Baeßler ◽  
R. Alarcon ◽  
L. P. Alonzi ◽  
S. Balascuta ◽  
L. Barrón-Palos ◽  
...  
Keyword(s):  
Beta Decay ◽  
Neutron Beta Decay

Tests of the standard model with free neutron beta decay

1991 ◽  
Vol 527 ◽  
pp. 239-250 ◽  
Author(s):  
D. Dubbers
Keyword(s):  
Standard Model ◽  
Beta Decay ◽  
Neutron Beta Decay ◽  
Free Neutron ◽  
The Standard Model
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