Radiative neutron β-decay in effective field theory

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

Research output: Contribution to journalArticle

24 Citations (Scopus)

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

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neutron decay
photons
bremsstrahlung
baryons
energy spectra
perturbation theory
degrees of freedom
neutrons
expansion
decay
polarization
electrons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Radiative neutron β-decay in effective field theory. / Bernard, Véronique; Gardner, Susan; Meißner, Ulf G.; Zhang, Chi.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 593, No. 1-4, 22.07.2004, p. 105-114.

Research output: Contribution to journalArticle

Bernard, Véronique ; Gardner, Susan ; Meißner, Ulf G. ; Zhang, Chi. / Radiative neutron β-decay in effective field theory. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2004 ; Vol. 593, No. 1-4. pp. 105-114.
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