A $\gamma \gamma$ Collider for the 750 GeV Resonant State

Abstract

Recent data collected by ATLAS and CMS at 13 TeV collision energy of the LHC indicate the existence of a new resonant state $\varphi$ with a mass of 750 GeV decaying into two photons $\gamma \gamma$. The properties of $\varphi$ should be studied further at the LHC and also future colliders. Since only $\varphi \to \gamma \gamma$ decay channel has been measured, one of the best ways to extract more information about $\varphi$ is to use a $\gamma \gamma$ collider to produce $\varphi$ at the resonant energy. In this work we show how a $\gamma \gamma$ collider helps to verify the existence of $\varphi$ and to provide some of the most important information about the properties of $\varphi$, such as branching fractions of $\varphi \to V_1{V}_2$. Here $V_i$ can be $\gamma$, $Z$, or $W^{\pm }$. We also show that by studying angular distributions of the final $\gamma$'s in $\gamma \gamma \to \varphi \to \gamma \gamma$, one can obtain crucial information about whether this state is a spin-0 or a spin-2 state.

arXiv commentReTex, 12 page with 6 figures. Expanded discussion on distinguishing spin-0 and spin-2 cases. Several figures added

References in corpus (6)

• On Kaluza-Klein States from Large Extra Dimensions
• The Minimal Model of a Diphoton Resonance: Production without Gluon Couplings
• Theoretical Basis of Higgs-Spin Analysis in $H\to \gamma \gamma$ and $Z\gamma$ Decays
• 750 GeV Diphoton Resonance in Warped Geometries
• Probe Noncommutative Space-Time Scale Using $\gamma \gamma \to Z$ At ILC
• Further Studies of Higgs Properties at An ILC $\gamma \gamma$ Collider

Cited by in corpus (12)

• Digamma, what next?
• Interpreting the 750 GeV digamma excess: a review
• Models of LHC Diphoton Excesses Valid up to the Planck scale
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• Exploring the Jet Multiplicity in the 750 GeV Diphoton Excess
• Learning from the New Higgs-like Scalar before It Vanishes
• Diphoton resonance at e+e- and photon colliders
• Production and Decay of Di-photon Resonance at Future $e^{+}{e}^{-}$ Colliders
• Implications of the 750 GeV gamma-gamma Resonance as a Case Study for the International Linear Collider
• Probing the origin of 750 GeV diphoton excess with the precision measurements at the ILC
• Diphoton resonance at the ILC