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##->#gg, 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. (orig.)Available from TIB Hannover: RA 2999(01-033) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman