Abstract
Electroweak precision tests allow for lighter Kaluza–Klein (KK) Higgs modes in the deformed Randall–Sundrum (RS) model than in models with custodial symmetry. The first KK mode of the Higgs (h1) in such a model could have a mass as low as 900 GeV. In this paper, we study the production of h1 and its subsequent decay to a tt¯ pair at the Large Hadron Collider (LHC), in the context of the deformed RS model. We have performed a hadron-level Monte Carlo simulation of the signal and the relevant Standard Model background. We present strategies to effectively suppress the huge SM background and provide a signal that is tractable at the future runs of the LHC.
Highlights
One of the most appealing solutions to the large hierarchy between the Planck scale and the electroweak (EW) scale is provided by the Randall–Sundrum (RS) Model [1]
In the original RS model (RS1), all the Standard Model fields along with the Higgs are localised on the IR brane with only the gravitons being UV-localised
We study the production of the first KK mode of Higgs within the framework of deformed RS model
Summary
One of the most appealing solutions to the large hierarchy between the Planck scale and the electroweak (EW) scale is provided by the Randall–Sundrum (RS) Model [1]. Such a model even other scales that ought to be naturally large, such as the ones that suppress proton decay or flavour-changing neutral currents or provide the desirably small neutrino masses, are warped down To avoid such issues and with the subsequent realisation that only the Higgs need be IR-localised to address hierarchy, a new class of RS models in which the Standard Model fields are allowed to propagate in the bulk were developed [2,3,4,5,6,7,8]. The deformation of the metric tends to localise the gauge KK modes closer to the IR brane than in the normal RS model and with the Higgs zero mode localised further out in the bulk its overlap with the gauge KK modes is reduced This relaxes the electroweak constraints considerably [20,19].
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