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An updated analysis of radion-higgs mixing in the light of LHC data

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Abstract

We explore the constraints on the parameter space of a Randall-Sundrum warped geometry scenario, where a radion field arises out of the attempt to stabilise the radius of the extra compact spacelike dimension, using the most recent data from higgs searches at the Large Hadron Collider (LHC) and the Tevatron. We calculate contributions from both the scalar mass eigenstates arising from radion-higgs kinetic mixing in all important search channels. The most important channel to be affected is the decay via WW(*),wherenoinvariantmasspeakcandiscernthetwodistinctphysicalstates. Improving upon the previous studies, we perform a full analysis in the WW(*) channel, taking into account the effect of various cuts and interference when the two scalar are closely spaced. We examine both cases where the experimentally discovered scalar is either ‘higgs-like’ or ‘radion-like’. The implications of a relatively massive scalar decaying into a pair of 125 GeV scalars is also included. Based on a global analysis of the current data, including not only a single 125 GeV scalar but also another one with mass over the range 110 to 600 GeV, we obtain the up-to-date exclusion contours in the parameter space. Side by side, regions agreeing with the data within 68% and 95% confidence level based on a χ2-minimisation procedure, are also presented.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University College London, London, U.K.

    Nishita Desai

  2. Regional Centre for Accelerator-based Particle Physics Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad, 211 019, India

    Ushoshi Maitra & Biswarup Mukhopadhyaya

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  1. Nishita Desai
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  2. Ushoshi Maitra
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  3. Biswarup Mukhopadhyaya
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Correspondence to Ushoshi Maitra.

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ArXiv ePrint: 1307.3765

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Desai, N., Maitra, U. & Mukhopadhyaya, B. An updated analysis of radion-higgs mixing in the light of LHC data. J. High Energ. Phys. 2013, 93 (2013). https://doi.org/10.1007/JHEP10(2013)093

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