Higgs-Boson Interactions within the Randall-Sundrum Model
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
The scalar sector of the Randall-Sundrum model is discussed. The effective potential for the Standard Model Higgs-boson (h) interacting with Kaluza-Klein excitations of the graviton and the radion (phi) has been derived and it has been shown that only the Standard Model-like vacuum is allowed. The theoretical and experimental consequences of the curvature-scalar mixing xi RHH introduced on the visible brane are considered and simple sum rules that relate the couplings of the mass eigenstates (h) and (phi) to pairs of vector bosons and fermions are derived. The sum rule for the ZZh and ZZ phi couplings in combination with LEP/LEP2 data implies that not both the h and phi can be light. We present explicit results for the still allowed region in the (mh,mphi) plane that remains after imposing the LEP upper limits for non-standard scalar couplings to a ZZ pair. The phenomenological consequences of the mixing are investigated and, in particular, it is shown that the Higgs-boson decay h -> phi phi would provide an experimental signature for non-zero xi and can have a very substantial impact on the Higgs-boson searches, having BR(h->phi phi) as large as 30 - 40 %.
Talk dedicated to Stefan Pokorski on his 60th birthday presented at the conference ``Planck 02'', Fifth European Meeting From the Planck Scale to the Electroweak Scale, ``Supersymmetry and Brane Worlds'', Kazimierz, Poland, May, 2002. 16 pages
Talk dedicated to Stefan Pokorski on his 60th birthday presented at the conference ``Planck 02'', Fifth European Meeting From the Planck Scale to the Electroweak Scale, ``Supersymmetry and Brane Worlds'', Kazimierz, Poland, May, 2002. 16 pages