摘要(英) |
In this thesis, we present the search for eta_b in CDF by looking into the exclusive eta_b decays into two J/psi where both J/psi decay into di-muon. Using the 1.1 fb^-1 data, we observed 3 candidate events with expected 3.6 background events in the search window, 9.0 to 9.5 GeV. The eta
_b production cross section, in relative to the cross section of b-Hadron decay to J/psi X, is measured in this analysis. The upper limit for eta_b production cross section with rapidity |y|<0.6, when multiplied by the decay branching fractions, is found to be < 5.0 * 10^-3 |
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