Study on CEPC performances with different collision energies and geometric layouts

TL;DR

This paper evaluates the performance of the Circular Electron-Positron Collider (CEPC) with different energies and layouts, analyzing luminosity, potential physics runs, and comparing with other major colliders.

Contribution

It provides detailed design options for 50km and 100km CEPC configurations, including single and double ring schemes, and assesses their performance and potential physics capabilities.

Findings

Luminosity depends on circumference and filling factor.

CEPC can effectively operate at Z and W boson poles.

Comparison shows CEPC's performance relative to LHC, FCC, and SPPC.

Abstract

Circular Electron-Positron Collider(CEPC) is one of the largest plans in high energy physics study at China, which would serve as Higgs Factory firstly and then upgrade to a hadron collider. In this paper we give the 50km and 100km design in both single ring and double ring schemes, including $Z$ boson and $W$ boson and Higgs boson by using the optimized method. Also, we give the potential of CEPC running at $Z$ and $W$ poles. And we analysis the relationship of luminosity with circumference and filling factor, which gives a way to evaluate the choice of geometry. What's more, we compare the nominal performance of CEPC-SPPC and LHC and FCC.