We illustrate the utility of jet-mass distributions as probes of new physics at the LHC, focusing on a heavy vector-quark doublet that mixes with the top as a concrete example. For 1 TeV vector-quark masses, we find that signals with greater than $5\sigma$ significance can be achieved after $100{\mathrm{fb}}^{-1}$. More generally, jet-mass distributions have the potential to provide signals for heavy states that produce highly boosted weak gauge bosons and/or top quarks.

• Received 7 February 2007

DOI:https://doi.org/10.1103/PhysRevD.75.115010