Observation of an anomalous number of dimuon events in a high energy neutrino beam

A search for long-lived neutral particles ( N0's) with masses above 2.2 GeV/c(2) that decay into at least one muon has been performed using an instrumented decay channel at the NuTeV experiment at Fermilab. Data were examined for particles decaying into the final states mumu, mu(e), and mu(pi)....

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Bibliographic Details
Published in:Physical review letters 2001-07, Vol.87 (4), p.041801-041801, Article 041801
Main Authors: 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, Drucker, R B, Fleming, B T, Frey, R, Formaggio, J A, Goldman, J, Goncharov, M, Harris, D A, Johnson, R A, Kim, J H, Koutsoliotas, S, Lamm, M J, Marsh, W, Mason, D, McDonald, J, McNulty, C, McFarland, K S, Naples, D, Nienaber, P, Romosan, A, Sakumoto, W K, Schellman, H, Shaevitz, M H, Spentzouris, P, Stern, E G, Suwonjandee, N, Tzanov, M, Vakili, M, Vaitaitis, A, Yang, U K, Yu, J, Zeller, G P, Zimmerman, E D
Format: Article
Language:English
Subjects:
DECAY
FERMILAB
MUONS
NEUTRAL PARTICLES
NEUTRINO BEAMS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
STANDARD MODEL
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Summary:A search for long-lived neutral particles ( N0's) with masses above 2.2 GeV/c(2) that decay into at least one muon has been performed using an instrumented decay channel at the NuTeV experiment at Fermilab. Data were examined for particles decaying into the final states mumu, mu(e), and mu(pi). Three mumu events were observed over an expected standard model background of 0.069+/-0.010 events; no events were observed in the other modes.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.87.041801