New Physics Search at the CEPC: a General Perspective

TL;DR

The CEPC is a proposed electron-positron collider that aims to explore physics beyond the Standard Model through precision measurements and searches for new phenomena like exotic decays, dark matter, and long-lived particles.

Contribution

This white paper presents a comprehensive perspective on the CEPC's potential to discover new physics, emphasizing advanced detection techniques and broad physics program.

Findings

Enhanced sensitivity to rare processes with advanced reconstruction techniques

Potential to probe electroweak baryogenesis and dark sector interactions

Complementary constraints on new physics models through global fits

Abstract

The Circular Electron-Positron Collider (CEPC), a proposed next-generation Higgs factory, provides new opportunities to explore physics beyond the Standard Model (SM). With its clean electron-positron collision environment and the ability to collect large samples of Higgs, W, and Z bosons, the CEPC enables precision measurements and searches for new physics. This white paper outlines the CEPC's discovery potential, including studies of exotic decays of the Higgs, Z, and top quarks, dark matter and dark sector phenomena, long-lived particles, supersymmetry, and neutrino-related signatures. Advanced detector technologies and reconstruction techniques, such as one-to-one correspondence reconstruction and jet origin identification, significantly improve sensitivity to rare and weakly interacting processes. The CEPC is particularly well suited to probe the electroweak phase transition and test models of electroweak baryogenesis and dark sector interactions. In addition, global fit analyses highlight the CEPC's complementary role in constraining a wide range of new physics scenarios. These features position the CEPC as a powerful tool for exploring the next frontier in fundamental particle physics in the post-Higgs discovery era.