Possible Futures of Electroweak Precision: ILC, FCC-ee, and CEPC

Understand

The future of high-precision electroweak physics lies in e+e- collider measurements of properties of the Z boson, the W boson, the Higgs boson, and the top quark.

• We estimate the expected performance of three possible future colliders: the ILC, FCC-ee (formerly known as TLEP), and CEPC.
• In particular, we present the first estimates of the possible reach of CEPC, China's proposed Circular Electron-Positron Collider, for the oblique parameters S and T and for seven-parameter fits of Higgs couplings.
• These results allow the physics potential for CEPC to be compared with that of the ILC and FCC-ee.