Search for Excited and Exotic Muons in the μγ Decay Channel in pp Collisions at s~(1/2) = 1.96 Te V

摘要

We search for excited and exotic muon states μ~* using an integrated luminosity of 371 pb~(-1) of pp collision data at s~(1/2) = 1.96 TeV. We search for associated production of μμ~* followed by the decay μ~* → μγ. We compare the data to model predictions as a function of the mass of the excited muon M_(μ~*), the compositeness energy scale Λ, and the gauge coupling factor f. No signal above the standard model expectation is observed. We exclude 107 < M_(μ~*) < 853 GeV/c~2 for Λ = M_(虀*) in the contact interaction model, and 100 < M_(μ~*) < 410 GeV/c~2 for f/Λ = 10~(-2) GeV~(-1) in the gauge-mediated model, both at the 95% confidence level.