Searches for Majoron production and other processes associated withπ→eνdecay

Abstract
Data from a new study of the decay π→eν are used to place bounds on Majoron-neutrino couplings and to obtain inclusive branching-ratio limits for π→eνM, where M is a new particle with a mass in the range 0 to 125 MeV. A limit for the process π+e+ννν¯ is also obtained.