, Volume 62, Issue 2, pp 319-326,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 28 May 2009

Search for narrow resonances lighter than ϒ mesons


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/c 2. 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.