Higgs Phenomenology of Minimal Universal Extra Dimensions
G. B\'elanger, A. Belyaev, M. Brown, M. Kakizaki, A. Pukhov
TL;DR
This paper investigates how minimal Universal Extra Dimensions modify Higgs boson production and decay rates, reinterpreting LHC search results to constrain the MUED parameter space around 125 GeV.
Contribution
It provides a detailed analysis of Higgs phenomenology in MUED and derives new experimental limits on the model parameters using LHC data.
Findings
Enhanced Higgs production via gluon fusion and decay into two photons in MUED.
Most of the MUED parameter space is excluded except a small region near 125 GeV.
Constraints on 1/R between 500 GeV and 1600 GeV at 95% confidence level.
Abstract
The minimal model of Universal Extra Dimensions (MUED) is briefly reviewed. We explain how the cross-sections for Higgs production via gluon fusion and decay into two photons are modified, relative the the Standard Model (SM) values, by KK particles running in loops, leading to an enhancement of the gg to h to two photons and gg to h to W+W- cross-sections. ATLAS and CMS searches for the SM Higgs in these channels are reinterpreted in the context of MUED and used to place new limits on the MUED parameter space. Only a small region of between 1 and 3 GeV around mh = 125 GeV for 500 GeV < 1/R < 1600 GeV remains open at the 95 % confidence level.
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