We present a search for excited and exotic muon states mu*,
conducted using an integrated luminosity of 371 pb-1 of data collected in
p anti-p collisions at s**(1/2) = 1.96 TeV at the Tevatron with the CDF II
detector. We search for associated production of mu mu* followed by the
decay mu* --> mu gamma, resulting in the mu mu gamma final state. We
compare the data to model predictions as a function of the mass of the
excited muon M_mu*, the compositeness energy scale Lambda, and the gauge
coupling factor f. No signal above the standard model expectation is
observed in the mu gamma mass spectrum. In the contact interaction model,
we exclude 107 < M_mu* < 853 GeV/c2 for Lambda = M_mu*; in the
gauge-mediated model, we exclude 100 < M_mu* < 410 GeV/c2 for f/Lambda =
10-2 GeV-1. These 95% confidence level exclusions extend previous limits
and are the first hadron collider results on mu* production in the
gauge-mediated model.
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Updated: Monday, 2006 June 19 15:02:40 CDT automatically from input from Carol Picciolo