Are heavy leptons found

Recently reported observations suggest the existence of a new particle without strong interactions. We interpret it as a massive neutral lepton L0 produced by decays of a new charged lepton L/sup plus-or-minus/ which in turn is pair-produced electromagnetically by cosmic rays. The mass of L/sup plus-or-minus/ must be approx.2 GeV; the lifetime of L0 must be approx.10-5 sec. Possible gauge models incorporating the new leptons are discussed, as are other experimental consequences