Recent results from the first phase of the E787 experiment and an update on the current status are presented. From the first phase the limit on the K[sup+][r-arrow][pi][sup+][nu][ovr[nu]] branching ratio is BR(K[sup+][r-arrow][pi][sup+][nu][ovr[nu]])

Recent results from the first phase of the E787 experiment and an update on the current status are presented. From the first phase the limit on the K →?+?{ovr?} branching ratio is BR(K+ →?+?{ovr?})

A collaboration from KEK, INS, Osaka, TRIUMF, Princeton, and BNL is currently running E787 at the AGS. The experiment is designed primarily to search for the rare decay K[sup+][yields][pi][sup+][nu][bar[nu]], with an expected branching ratio of[approximately] 10[sup[minus]10]. The authors report evidence that they have observed this decay. They also discuss the future outlook for the experiment.