Feasibility study of measurement of Higgs pair creation in a gamma gamma collider

TL;DR

This study assesses the potential to measure Higgs pair production in a gamma gamma collider, identifying optimal energy conditions and background processes, and demonstrating possible observation with high statistical significance.

Contribution

It provides a feasibility analysis of Higgs pair measurement in gamma gamma colliders, highlighting optimal energy and analysis strategies for detection.

Findings

Optimal collision energy around 270 GeV.

Main backgrounds include gamma gamma to WW, ZZ, and bbbb.

Higgs pair could be observed with about 5 sigma significance.

Abstract

We studied the feasibility of measurement of Higgs pair creation in a gamma gamma collider. We found the optimum collision energy is around 270 GeV from the sensitivity study with Higgs boson mass of 120 GeV/c^2. Main backgrounds are gamma gamma to WW, gamma gamma to ZZ, and gamma gamma to bbbb at the optimum collision energy. The preliminary analysis shows HH could be observed with the statistical significance of about 5 sigma when we chose correct assignment of a track by using color singlet information.