Search prospects of light stabilized radions at Tevatron and LHC

In this paper we use the conformal anomaly in QCD to derive the radion coupling to gluons in the Randall-Sundrum model and use it to compute the radion production cross section at hadron colliders by gluon fusion. We find that for vacuum expectation value of radion field, 〈φ〉 =1 TeV the radion production cross section by gluon fusion at LHC would exceed that of the Standard Model (SM) higgs boson by a factor that lies between 7 and 8 over most of the mass range. The radion production cross-section decreases as 1〈φ〉2 and for 〈φ〉 greater than 3 TeV, the higgs production cross-section exceeds that of the radion production. The decay modes of the radion are similar to that of the SM higgs boson. But the striking feature is the enhancement of radion to 2-photon and radion to 2-gluon branching ratio over the SM case . Utilizing this, we then discuss the possible search strategies of such scalars at the Tevatron and LHC. Using the γγ decay mode one can explore/exclude radion mass upto 1 TeV at the LHC. Even with the current collected luminosity at the Tevatron, one can exclude radion mass upto 120 GeV for 〈φ〉 = 1 TeV.