Abstract
The KTeV experiment at Fermilab has isolated a total of 132 events from the rare decay [Formula presented], with an estimated background of 0.8 events. The branching ratio of this mode is determined to be [Formula presented], with a radiative cutoff of [Formula presented]. The first measurement using this mode of the parameter [Formula presented] from the D’Ambrosio-Isidori-Portolès (DIP) model of the [Formula presented] vertex yields a result of [Formula presented], consistent with values obtained from other decay modes. Because of the limited statistics, no sensitivity is found to the DIP parameter [Formula presented]. We use this decay mode to set limits on CP and lepton violation.
Original language | English (US) |
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Pages (from-to) | 5 |
Number of pages | 1 |
Journal | Physical review letters |
Volume | 90 |
Issue number | 14 |
DOIs | |
State | Published - 2003 |
Externally published | Yes |