If quarks are composite particles then excited states are expected. We
estimate the discovery mass reach as a function of integrated luminosity for
excited quarks decaying to dijets at the Tevatron, LHC, and a Very Large Hadron
Collider (VLHC). At the Tevatron the mass reach is 0.94 TeV for Run II (2
fb^-1) and 1.1 TeV for TeV33 (30 fb^-1). At the LHC the mass reach is 6.3 TeV
for 100 fb^-1. At a VLHC with a center of mass energy, sqrt(s), of 50 TeV (200
TeV) the mass reach is 25 TeV (78 TeV) for an integrated luminosity of 10^4
fb^-1. However, an excited quark with a mass of 25 TeV would be discovered at a
hadron collider with sqrt(s)=100 TeV and an integrated luminosity of 13 fb^-1,
illustrating a physics example where a factor of 2 in machine energy is worth a
factor of 1000 in luminosity.Comment: 5 pages, 3 Figures, LaTex, macros epsf.sty, snowtimes.sty, and
snow2e.cls. To appear in the proceedings of DPF/DPB Summer Study on New
Directions for High Energy Physics, Snowmass, Colorado, June 25-July 12,
1996. Postscript file of full paper also available at
http://www-cdf.fnal.gov/physics/conf96/cdf3874_snow_excited_quarks.p