Abstract
We have studied the rare weak radiative hyperon decay in the KTeV experiment at Fermilab. We have identified 4045 signal events over a background of 804 events. The dominant decay, which was used for normalization, is the only important background source. An analysis of the acceptance of both modes yields a branching ratio of . By analyzing the final state decay distributions, we have also determined that the emission asymmetry parameter for this decay is .
- Received 11 December 2000
DOI:https://doi.org/10.1103/PhysRevLett.86.3239
©2001 American Physical Society