We report on a search for the rare decay KL → π0νν + ̄ in the KTeV experiment at Fermilab. We searched for two-photon events whose kinematics were consistent with an isolated π0 coming from the decay KL → π0νν + ̄. One candi date event was observed, which was consistent with the expected level of background. An upper limit on the branching ratio was determined to be B(KL → π0νν + ̄) < 1.6 × 10-6 at the 90% confidence level.
|Original language||English (US)|
|Number of pages||6|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - 1999|
ASJC Scopus subject areas
- Nuclear and High Energy Physics