Tests of the Standard Model in Neutron Beta Decay with Polarized Neutron and Electron and Unpolarized Proton

Abstract

We analyse the electron--energy and angular distribution of the neutron beta decay with polarized neutron and electron and unpolarized proton, calculated in Phys. Rev. C 95, 055502 (2017) within the Standard Model (SM), by taking into account the contributions of interactions beyond the SM. After the absorption of vector and axial vector contributions by the axial coupling constant and Cabibbo-Kobayashi-Maskawa (CKM) matrix element (Bhattacharya et al., Phys. Rev. D 85, 054512 (2012) and so on) these are the contributions of scalar and tensor interactions only. The neutron lifetime, correlation coefficients and their averaged values, and asymmetries of the neutron beta decay with polarized neutron and electron are adapted to the analysis of experimental data on searches of contributions of interactions beyond the SM. Using the obtained results we propose some estimates of the values of the scalar and tensor coupling constants of interactions beyond the SM. We use the estimate of the Fierz interference term "b_F = - 0.0028 +/- 0.0026" by Hardy and Towner (Phys. Rev. C 91, 025501 (2015)), the neutron lifetime "tau_n = 880.2(1.0)s"(Particle Data Group, Chin. Phys. C 40, 100001 (2016)) and the experimental data "N_{\exp} = 0.067 +/- 0.011_{\rm stat.} +/- 0.004_{\rm syst.}" for the averaged value of the correlation coefficient of the neutron-electron spin-spin correlations, measured by Kozela et al. (Phys. Ref. C 85, 045501 (2012)). The contributions of G-odd correlations are calculated and found at the level of 10^{-5} in agreement with the results obtained by Gardner and Plaster (Phys. Rev. C 87, 065504 (2013)).

arXiv comment15 pages, 1 figure

References in corpus (27)

• Tests of the standard electroweak model in beta decay
• Probing Novel Scalar and Tensor Interactions from (Ultra)Cold Neutrons to the LHC
• Superallowed 0+ --> 0+ nuclear beta decays: 2014 critical survey, with precise results for Vud and CKM unitarity
• Semileptonic decays of light quarks beyond the Standard Model
• Beta Decays and Non-Standard Interactions in the LHC Era
• Measurement of the neutron lifetime using an asymmetric magneto- gravitational trap and in situ detection
• Precision Measurements and CKM Unitarity
• Determination of the Weak Axial Vector Coupling from a Measurement of the Beta-Asymmetry Parameter A in Neutron Beta Decay
• Neutron Lifetime and Axial Coupling Connection
• Non-standard Charged Current Interactions: beta decays versus the LHC
• Precision Measurement of the Neutron Beta-Decay Asymmetry
• New result for the neutron $\beta$-asymmetry parameter $A_0$ from UCNA
• A clean, bright, and versatile source of neutron decay products
• Neutron Beta-Decay as Laboratory for Test of Standard Model
• Sharpening Low-Energy, Standard-Model Tests via Correlation Coefficients in Neutron Beta-Decay
• Zemach and magnetic radius of the proton from the hyperfine splitting in hydrogen
• Measurement of the Transverse Polarization of Electrons Emitted in Free Neutron Decay
• Measurement of the neutron $\beta$-asymmetry parameter $A_0$ with ultracold neutrons
• Measurement of Transverse Polarization of Electrons Emitted in Free Neutron Decay
• General classification and analysis of neutron beta-decay experiments
• Framework for maximum likelihood analysis of neutron beta decay observables to resolve the limits of the V-A law
• Precision analysis of electron energy spectrum and angular distribution of neutron beta decay with polarized neutron and electron
• Asymmetry of recoil protons in neutron beta-decay
• The Bound-State Beta Decay of the Neutron Revisited
• Precision Theoretical Analysis of Neutron Radiative Beta Decay to Order "O(α^2/π^2)"
• Lorentz Structure of Vector Part of Matrix Elements of Transitions n <-> p, Caused by Strong Low-Energy Interactions and Hypothesis of Conservation of Charged Vector Current
• Precision Theoretical Analysis of Neutron Radiative Beta Decay

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