Further Studies of Higgs Properties at An ILC $\gamma \gamma$ Collider

Abstract

Recently the ATLAS and CMS experiments at the LHC have found a Higgs like boson $h$ with a mass around 125 GeV from several decay modes. The decay mode $h\to \gamma \gamma$ is one of the most important modes in studying whether $h$ is actually the standard model (SM) Higgs boson. Current data indicate that $h\to \gamma \gamma$ has a branching ratio larger than the SM prediction for $h$ being identified as the SM Higgs boson. To decide whether the $h$ discovered at the LHC is the SM Higgs boson, more data are needed. We study how $\gamma \gamma$ collider can help to provide some of the most important information about the Higgs boson properties. We show that a $\gamma \gamma$ collider can easily verify whether the enhanced $h\to \gamma \gamma$ observed at the LHC hold. Different models can be tested by studying Higgs boson decay to $\gamma Z$. Studying angular distribution of the $\gamma \gamma$ through on-shell production of $h$ and its subsequent decays into a $\gamma \gamma$ pair can decide whether the Higgs like boson $h$ at the LHC is a spin-0 or a spin-2 boson.

RevTex 9 pages with 4 figures

References in corpus (5)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Theoretical Basis of Higgs-Spin Analysis in $H\to \gamma \gamma$ and $Z\gamma$ Decays
• Note on 125 GeV Spin-2 particle
• Probe Noncommutative Space-Time Scale Using $\gamma \gamma \to Z$ At ILC

Cited by in corpus (3)

• Higgs Spin Determination in the WW channel and beyond
• A $\gamma \gamma$ Collider for the 750 GeV Resonant State
• Tree level relations in a composite electroweak theory