ISR effects for resonant Higgs production at future lepton colliders

TL;DR

This paper analyzes how initial state radiation affects resonant Higgs production at future lepton colliders, providing insights to optimize collider design and Higgs detection strategies.

Contribution

It offers a detailed convolution of ISR effects with beam energy spread and resonance profiles, enhancing the understanding of Higgs signal and background impacts at future colliders.

Findings

ISR significantly affects Higgs signal detection

Beam energy spread influences resonance profile accuracy

Guidance for collider design optimization

Abstract

We study the effects of the initial state radiation on the $s$-channel Higgs boson resonant production at $\mu^+\mu^-$ and $e^+e^-$ colliders by convoluting with the beam energy spread profile of the collider and the Breit-Wigner resonance profile of the signal. We assess their impact on both the Higgs signal and SM backgrounds for the leading decay channels $h\rightarrow b\bar b,\ WW^*$. Our study improves the existing analyses of the proposed future resonant Higgs factories and provides further guidance for the accelerator designs with respect to the physical goals.