H → e + e − at the CEPC: initial state radiation effect with MadGraph.

The Circular Electron–Positron Collider (CEPC) is a future Higgs factory proposed by the Chinese high energy physics community. It will operate at a center-of-mass energy of 240–250 GeV. The CEPC will accumulate an integrated luminosity of 5 ab in ten years’ operation. With GEANT4-based full simulation samples for the CEPC, the Higgs boson decaying into an electron pair is studied at the CEPC. The upper limit of could reach 0.024% at 95% confidence level. The signal process is generated by MadGraph, with initial state radiation implemented6, as a first step to adjusting MadGraph for an electron–positron collider. [ABSTRACT FROM AUTHOR]