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

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 ($\lesssim 100 {\rm GeV}$) 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 $\Lambda_\phi\sim 3 {\rm TeV}$, where $\Lambda_\phi$ is a scale parameter which suppresses the interactions of radion to the Standard Model particles.Comment: 13pages, 6figures. v2:References added. Fig.2 and text, modifie

Production and decay of a heavy radion in Randall-Sundrum model at the LHC

We study production and decay of a radion predicted in the Randall-Sundrum model at the LHC. The radion is a scalar particle and its production and decay channels are quite similar to those of the Higgs boson. We find constraints on the model parameter space taking account of the results of the Higgs boson search at the LHC. We also study a possibility discriminating the radion from the scalar particles in the other model such as the supersymmetric standard model at the LHC experiments.Comment: 3 pages, 3 figures. Proceedings of Hadron Collider Physics Symposium 2012, Typos correcte