Search for heavy metastable particles decaying to quark pairs at CDF

We report on the search for heavy metastable particles that decay into quark pairs with a macroscopic lifetime (ctau ∼ 1 cm) using data taken with the CDF II detector at Fermilab. We use a data driven background approach, where we build probability density functions to model Standard Model secondary vertices from known processes in order to estimate the background contribution from the Standard Model. No statistically significant excess is observed above the background. Limits on the production cross section in a Hidden Valley benchmark phenomenology are set for various Higgs boson masses as well as metastable particle masses and lifetimes.