Decay in Flight of a Negative and a PositiveτMeson

Abstract

Measurements made on two $\tau$ mesons, one positive and one negative, which decayed in flight in a cloud chamber in a magnetic field are given. The $Q$-value calculated for the positive event is 84±6 Mev and for the negative event is 77±9 Mev. The momentum, energy, and angles of the decay products in the center-of-mass system are also given.