The Higgs Signatures at the CEPC CDR Baseline

TL;DR

This paper evaluates the Higgs detection capabilities of the CEPC's baseline detector, APODIS, focusing on various decay modes and demonstrating its effectiveness in precise Higgs property measurements.

Contribution

It provides a detailed analysis of Higgs signatures at the CEPC baseline detector, including performance metrics for different decay channels and mass reconstruction accuracy.

Findings

Comparable Higgs mass reconstruction accuracy across decay modes

Effective separation of Higgs decay cascades in WW* and ZZ* modes

Quantified detector performance for charged particles, photons, and jets

Abstract

As a Higgs factory, The CEPC (Circular Electron-Positron Collider) project aims at the precise measurement of the Higgs boson properties. A baseline detector concept, APODIS (A PFA Oriented Detector for the HIggS factory), has been proposed for the CEPC CDR (Conceptual Design Report) study. We explore the Higgs signatures at this baseline setup with nunuHiggs events. The detector performance of the charged particles, the photons, and the jets are quantified with Higgs -> mumu, gammagamma, and jet final states respectively. The accuracy of reconstructed Higgs boson mass is comparable at different decay modes with jets in the final states. We also analyze the Higgs -> WW* and ZZ* decay modes, where a clear separation between different decay cascades is observed.