Abstract
E865 at the Brookhaven National Laboratory AGS collected about 70 000 events to measure the branching ratio relative to the observed , , and decays. The in all the decays was detected using the pair from decay and no photons were required. Using the 2002 Particle Data Group branching ratios for the normalization decays, we obtain , where includes the effect of virtual and real photons. This result is higher than the current Particle Data Group value. Implications for the element of the CKM matrix, and the matrix’s unitarity are discussed.
- Received 15 May 2003
DOI:https://doi.org/10.1103/PhysRevLett.91.261802
©2003 American Physical Society