Search for Neutral Heavy Leptons in a High-Energy Neutrino Beam

• Published in: Physical review letters 1999-12, Vol.83 (24), p.4943-4946
• Main Authors: Vaitaitis, A., Drucker, R. B., Formaggio, J., Koutsoliotas, S., Adams, T., Alton, A., Avvakumov, S., de Barbaro, L., de Barbaro, P., Bernstein, R. H., Bodek, A., Bolton, T., Brau, J., Buchholz, D., Budd, H., Bugel, L., Conrad, J., Fleming, B. T., Frey, R., Goldman, J., Goncharov, M., Harris, D. A., Johnson, R. A., Kim, J. H., Lamm, M. J., Marsh, W., Mason, D., McFarland, K. S., McNulty, C., Monroe, J., Naples, D., Nienaber, P., Romosan, A., Sakumoto, W. K., Schellman, H., Shaevitz, M. H., Spentzouris, P., Stern, E. G., Vakili, M., Wu, V., Yang, U. K., Yu, J., Zeller, G. P., Zimmerman, E. D.
• Format: Article
• Language: English
• Subjects: ELECTRONS; EXPERIMENTAL DATA; HADRONIC PARTICLE DECAY; LEPTONS; MUONS; NEUTRINO OSCILLATION; NEUTRINOS; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PIONS; STANDARD MODEL
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.83.4943

A search for neutral heavy leptons (NHLs) has been performed using an instrumented decay channel at the NuTeV (E-815) experiment at Fermilab. The data were examined for NHLs decaying into muonic final states ({mu}{mu}{nu} , {mu}e{nu} , {mu}{pi} , and {mu}{rho} ); no evidence has been found for NHLs in the 0.25-2.0 GeV mass range. This analysis places limits on the mixing of NHLs with standard light neutrinos at a level up to an order of magnitude more restrictive than previous search limits in this mass range. (c) 1999 The American Physical Society.