Abstract
We present a measurement of the lepton decay asymmetry in the reaction B¯→ν using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of confirms that the chirality of the weak interaction is predominantly left-handed in b→c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using and the previously determined branching ratio, distribution, and polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.
- Received 28 July 1992
DOI:https://doi.org/10.1103/PhysRevD.47.791
©1993 American Physical Society