Table 1. Parameters of electron-positron accelerators/detectors

Accelerator/detector	Type	s [GeV]	Circumference or length [km]
CEPC/CEPC	Circular	91 (e+: 45.5, e−: 45.5)	100
		160 (e+: 80, e−: 80)
		240 (e+: 120, e−: 120)
FCC-ee/IDEA	Circular	91 (e+: 45.5, e−: 45.5)	97.75
		160 (e+: 80, e−: 80)
		250 (e+: 125, e−: 125)
		350 (e+: 175, e−: 175)
ILC/ILD	Linear	250 (e+: 125, e−: 125)	20.5
		500 (e+: 250, e−: 250)	31
		1,000 (e+: 500, e−: 500)	40

Adapted from Particle Data Group et al. (2020) with permission of the Oxford University Press.
CEPC, Circular Electron Positron Collider; FCC-ee, Future Circular Collider; IDEA, Innovative Detector for Electron-positron Accelerator; ILC, International Linear Collider; ILD, International Large Detector.