Precision theoretical analysis of neutron radiative beta decay to order O(α2/π2)

2017/06/26 by A. N. Ivanov, Roman Höllwieser, N. I. Troitskaya +2 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions

paper · doi:10.1103/physrevd.95.113006

openalex publication_date 2017/06/26 · openalex created_date 2017/06/30 · openalex updated_date 2026/08/01

Abstract

In the Standard Model (SM) we calculate the decay rate of the neutron radiative \ensuremathβ^\ensuremath- decay to order O(\ensuremathα²/\ensuremathπ²\ensuremath∼10^\ensuremath-5), where \ensuremathα is the fine-structure constant, and radiative corrections to order O(\ensuremathα/\ensuremathπ\ensuremath∼10^\ensuremath-3). The obtained results together with the recent analysis of the neutron radiative \ensuremathβ^\ensuremath- decay to next-to-leading order in the large proton-mass expansion, performed by Ivanov et al. [Phys. Rev. D 95, 033007 (2017)], describe recent experimental data by the RDK II Collaboration [Bales et al., Phys. Rev. Lett. 116, 242501 (2016)] within 1.5 standard deviations. We argue a substantial influence of strong low-energy interactions of hadrons coupled to photons on the properties of the amplitude of the neutron radiative \ensuremathβ^\ensuremath- decay under gauge transformations of real and virtual photons.

Citations

• General Properties of the Electromagnetic Corrections to the Beta Decay of a Physical Nucleon
• Current algebra formulation of radiative corrections in gauge theories and the universality of the weak interactions
• Effective Lagrangians and Field Algebras with Chiral Symmetry
• The axial vector current in beta decay
• Review of Multibody Charm Analyses

Cited by

• Gauge properties of hadronic structure of nucleon in neutron radiative beta decay to order O(α/π) in standard V − A effective theory with QED and linear sigma model of strong low-energy interactions
• Beta decay [wikipedia]