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 language | English (US) |
|---|---|
| Pages (from-to) | 105-114 |
| Number of pages | 10 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 593 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - Jul 22 2004 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Bernard, V., Gardner, S., Meißner, U. G., & Zhang, C. (2004). Radiative neutron β-decay in effective field theory. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 593(1-4), 105-114. https://doi.org/10.1016/j.physletb.2004.04.064