학술논문
Search for a nearly degenerate lepton doublet (L-,L0).
Document Type
article
Author
Riles, K; Perl, ML; Barklow, T; Boyarski, A; Burchat, PR; Burke, DL; Dorfan, JM; Feldman, GJ; Gladney, L; Hanson, G; Hayes, K; Hollebeek, RJ; Innes, WR; Jaros, JA; Karlen, D; Klein, SR; Lankford, AJ; Larsen, RR; LeClaire, BW; Lockyer, NS; Lüth, V; Ong, RA; Richter, B; Yelton, JM; Abrams, G; Amidei, D; Baden, AR; Boyer, J; Butler, F; Gidal, G; Gold, MS; Goldhaber, G; Golding, L; Haggerty, J; Herrup, D; Juricic, I; Kadyk, JA; Levi, ME; Nelson, ME; Rowson, PC; Schellman, H; Schmidke, WB; Sheldon, PD; Trilling, GH; Wood, DR; Schaad, T
Source
Physical review. D, Particles and fields. 42(1)
Subject
Language
Abstract
We have searched for a heavy charged lepton with an associated neutrino of nearly the same mass in e+e- annihilation data taken with the Mark II detector at a center-of-mass energy of 29 GeV. In order to suppress contamination from conventional two-photon reactions, this analysis uses a novel, radiative-tagging technique. Requiring the presence of an isolated, energetic photon allows a search for lepton doublets with mass splittings smaller than that previously accessible to experiment. No evidence for such a new lepton doublet has been found, enabling limits to be placed on allowed mass combinations. Mass splittings as low as 250-400 MeV/c2 are excluded for charged-lepton masses between 500 MeV/c2 and 10 GeV/c2. © 1990 The American Physical Society.