CHARGE: A long-term goal of the US high energy physics program is to regain the energy frontier after the start of LHC operation. A very high energy, high luminosity hadron collider is the only sure way to accomplish this goal. The Working Group on Hadron Colliders should develop a vision and a long-term plan for the US hadron collider program. In particular, it should examine the physics and technology issues central to the design of very high energy, high luminosity hadron colliders and specify the most critical accelerator physics and engineering issues that determine the performance of the machine; identify the technology developments and accelerator physics experiments needed to prove the machine feasible, and evaluate and estimate the technological and physics limitations on ultimate energy and luminosity in hadron colliders.
The results of the recently completed VLHC study of a staged collider in a large-circumference tunnel should be evaluated and compared with other potential approaches to building and operating very large hadron colliders. Finally, an R&D plan that will accomplish the goals set out above should be developed. This plan should prioritize the areas of technology R&D that will provide maximal benefit to a future VLHC in terms of performance and cost-effectiveness, and should include an estimated cost and schedule for the R&D.