Radiative neutron β-decay in effective field theory

Véronique Bernard, Susan Gardner, Ulf G. Meißner, Chi Zhang

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

We consider radiative β-decay of the neutron in heavy baryon chiral perturbation theory, with an extension including explicit Δ degrees of freedom. We compute the photon energy spectrum as well as the photon polarization; both observables are dominated by the electron bremsstrahlung contribution. Nucleon-structure effects not encoded in the weak coupling constants gA and gV are determined at next-to-leading order in the chiral expansion, and enter at the O(0.5%)-level, making a sensitive test of the Dirac structure of the weak currents possible.

Original languageEnglish (US)
Pages (from-to)105-114
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume593
Issue number1-4
DOIs
StatePublished - Jul 22 2004

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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