Search for Narrow Resonances below the ϒ Mesons

We report a search for narrow resonances that decay into muon pairs in the invariant mass range 6.3-9.0 GeV/c2 The data, collected by the CDF II experiment at the Fermilab Tevatron collider, correspond to an integrated luminosity of 630 pb-1. We set 90% upper credible limits at about 1% on R, the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the ϒ(1S) meson.

The results have been approved as of Jul 3rd, 2008.

A more detailed summary of the results can be found here: pdf.

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