Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2006-06-19
Phys.Rev.Lett.97:191802,2006
Physics
High Energy Physics
High Energy Physics - Experiment
Submitted to Phys. Rev. Lett., 7 pages, 4 Figures
Scientific paper
10.1103/PhysRevLett.97.191802
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-pbar collisions at sqrt{s} = 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/c^2 for Lambda = M(mu*); in the gauge-mediated model, we exclude 100 < M(mu) < 410 GeV/c^2 for f/Lambda = 0.01/GeV. These 95% confidence level exclusions extend previous limits and are the first hadron collider results on mu* production in the gauge-mediated model.
Abulencia A.
CDF Collaboration
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