Search for narrow resonances lighter than ϒ mesons
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Search for narrow resonances lighter than ϒ mesons

et al.
Abstract

We report a search for narrow resonances, produced in $$p\bar{p}$$ collisions at $$\sqrt{s}=1.96$$  TeV, that decay into muon pairs with invariant mass between 6.3 and 9.0 GeV/c2. The data, collected with the CDF II detector at the Fermilab Tevatron collider, correspond to an integrated luminosity of 630 pb−1. We use the dimuon invariant mass distribution to set 90% upper credible limits of about 1% to the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the ϒ(1S) meson.

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