  A variety of new physics models predict heavy resonances that decay to
multiple hadronic jets. These models include axigluons, colorons, diquarks,
excited quarks, Randall-Sundrum gravitons, string resonances, and Z' models,
among others. Other models make the prediction that high-pT jets will be
suppressed, resulting in jet extinction. Using the data collected in 2012 at a
center-of-mass energy of 8 TeV, the CMS Collaboration has made a baseline
inclusive jet cross section measurement for comparison with new-physics
searches, and then performed searches for jet extinction and resonances that
decay to two hadronic jets. The results of these searches will be presented. No
evidence of new physics has been observed, and these results set new limits on
the parameters of these models.
