Abstract
We present the first measurement of the form factor ratios (direct axial vector to vector), (second class current), and (weak magnetism) for the decay using the KTeV (E799) beam line and detector at Fermilab. From the polarization measured with the decay and the correlation, we measure to be , assuming the (flavor) values for and . Our results are all consistent with exact symmetry.
- Received 10 May 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.132001
©2001 American Physical Society