Papers in the Biological Sciences


Date of this Version



Journal of Research of the National Institute of Standards and Technology (July-August 2005) 110(4): 411-414.


U.S. Government author.


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.