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Radiative Neutron Β-Decay In Effective Field Theory, Susan Gardner, Véronique Bernard, Ulf-G. Meißner, Chi Zhang
Radiative Neutron Β-Decay In Effective Field Theory, Susan Gardner, Véronique Bernard, Ulf-G. Meißner, Chi Zhang
Center for Plant Science Innovation: Faculty and Staff Publications
In summary, we have computed the photon energy spectrum and photon polarization in neutron radiative β-decay in an effective field theory approach, utilizing HBCHPT and the SSE, including all terms in O(1/M). The leading contribution to the photon energy spectrum has been calculated previously [4]; we agree with the expression in Ref. [4] for Σspins |M|2, though we disagree with their numerical results for the photon energy spectrum. Moreover, we find that the O(1/M) terms are numerically quite small, generating contributions no larger than O(0.5 %), so that radiative neutron β-decay is quite insensitive to nucleon structure …
Radiative Neutron Β-Decay In Effective Field Theory, Susan Gardner, Véronique Bernard, Chi Zhang
Radiative Neutron Β-Decay In Effective Field Theory, Susan Gardner, Véronique Bernard, Chi Zhang
School of Biological Sciences: Faculty Publications
We consider radiative β-decay of the neutron in heavy baryon chiral perturbation theory. 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.