Radion Phenomenology in the Randall Sundrum Scenario
Abstract
Phenomenology of a radion (\phi) in the Randall-Sundrum scenario is discussed. The radion couples to the trace of energy momentum tensor of the standard model with a strength suppressed only by a new scale (\Lambda_{\phi}) which is an order of the electroweak scale. In particular, the effective coupling of a radion to two gluons is enhanced due to the trace anomaly of QCD. Therefore, its production cross section at hadron colliders could be enhanced, and the dominant decay mode of a relatively light radion is \phi \to g g, unlike the SM Higgs boson case. We also present constraints on the mass m_{\phi} and the new scale \Lambda_{\phi} from the Higgs search limit at LEP, perturbative unitarity bound and the stability of the radion/Higgs potential under radiative corrections.