Production and decay of radion in Randall-Sundrum model at a photon collider

Abstract

A warped extra dimension model predicts an extra scalar particle beyond the Standard Model which is called a radion. Although interactions of the radion are similar to those of the Higgs boson in the Standard Model, a relatively light radion ($\lesssim 100\mathrm{GeV}$) is not severely constrained from the Higgs search experiments at the LHC. In this paper we study discovery potential of the radion at a photon collider as an option of ILC. Owing to the trace anomaly of the energy-momentum tensor, both a production of radion in $\gamma \gamma$ collision and its decay to gluon pair are enhanced sizably. We find that the photon collider has a sensitivity for discovering the radion in low-mass region up to ${\Lambda }_{\varphi }\sim 3\mathrm{TeV}$, where ${\Lambda }_{\varphi }$ is a scale parameter which suppresses the interactions of radion to the Standard Model particles.

arXiv comment13pages, 6figures. v2:References added. Fig.2 and text, modified

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Cited by in corpus (2)

• Interactions of a Stabilized Radion and Duality
• Investigation of the scalar unparticle and anomalous couplings at muon colliders in final states with multiple photons in the Randall- Sundrum model