Search for the decay K+ ---> pi+ pi0 neutrino anti-neutrino
Search for the decay K+ ---> pi+ pi0 neutrino anti-neutrino
The first search for the decay K{sup +}{yields}{pi}{sup +}{pi}{sup 0}{nu}{bar {nu}} has been performed with the E787 detector at BNL. Based on zero events observed in the kinematical search region defined by 90 MeV/c <P{sub {pi}{sup +}}<188 MeV/c and 135 MeV<E{sub {pi}{sup 0}}<180 MeV, an upper limit B(K{sup +}{yields}{pi}{sup +}{pi}{sup …