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.
Highlights
Follow this and additional works at: https://digitalcommons.unl.edu/bioscifacpub Part of the Atomic, Molecular and Optical Physics Commons
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
We show the photon energy spectrum dΓ/dω in Fig. 1, and for the total branching ratio, which depends on the range chosen for ω, we find, ω ∈ [0.005 MeV, 0.035 MeV], ω ∈ [0.035 MeV, 0.100 MeV], ω ∈ [0.100 MeV, ωmax = 0.782 MeV], Br : 2.59 · 10–3, Br : 1.11 · 10–3, Br : 0.72 · 10–3
Summary
Follow this and additional works at: https://digitalcommons.unl.edu/bioscifacpub Part of the Atomic, Molecular and Optical Physics Commons. Radiative Neutron β-Decay in Effective Field Theory Susan; Bernard, Véronique; and Zhang, Chi, "Radiative Neutron β-Decay in Effective Field Theory" (2005).
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