Physics Potential of a Tevatron Tripler

We explore the capabilities for new physics discovery in proton-antiproton collisions at 5.4 TeV center-of-mass energy with luminosity $10^{33} cm^{-2} s^{-1}$ at a Tripler upgrade of the Tevatron collider. The prospects are robust for the usual Higgs boson and supersymmetry benchmarks. With an integrated luminosity of 40 fb${}^{-1}$, discoveries at 5$\sigma$ could be made for a standard Higgs boson of mass $\text{alt}680$ GeV (600 GeV for 10 fb${}^{-1}$), a lighter chargino of mass $\text{alt}380$ GeV, and an extra $Z$ boson of mass $\alt 2.6$TeV;four-fermioncontactinteractionsfromnewphysicswithscale$\alt 74$ TeV could be excluded at the 95% confidence level.