• DOI:10.1103/PhysRevD.95.113006
• Corpus ID: 119103283

Precision theoretical analysis of neutron radiative beta decay to order O (α 2 /π 2 )

@article{Ivanov2017PrecisionTA,
  title={Precision theoretical analysis of neutron radiative beta decay to order O ($\alpha$ 2 /$\pi$ 2 )},
  author={Andrei Ivanov and Roman Hollwieser and N. I. Troitskaya and Markus Wellenzohn and Yaroslav A. Berdnikov},
  journal={Physical Review D},
  year={2017},
  volume={95},
  pages={113006}
}

• A. Ivanov, R. Hollwieser, +2 authors Y. Berdnikov
• Published 26 June 2017
• Materials Science, Physics
• Physical Review D

In the Standard Model (SM) we calculate the decay rate of the neutron radiative ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay to order $O({\ensuremath{\alpha}}^{2}/{\ensuremath{\pi}}^{2}\ensuremath{\sim}{10}^{\ensuremath{-}5})$, where $\ensuremath{\alpha}$ is the fine-structure constant, and radiative corrections to order $O(\ensuremath{\alpha}/\ensuremath{\pi}\ensuremath{\sim}{10}^{\ensuremath{-}3})$. The obtained results together with the recent analysis of the neutron radiative ${\ensuremath{\beta}}^{\ensuremath{-}}$ 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 ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay under gauge transformations of real and virtual photons.