Searches for Majoron production and other processes associated withπ→eνdecay

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