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Search for Higgs bosons of the universal extra dimensions at the large Hadron collider

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Abstract

The Higgs sector of the Universal Extra Dimensions (UED) has a rather involved setup. With one extra space dimension, the main ingredients to the construct are the higher Kaluza-Klein (KK) excitations of the Standard Model Higgs boson and the fifth components of the gauge fields which on compactification appear as scalar degrees of freedom and can mix with the former thus leading to physical KK-Higgs states of the scenario. In this work, we explore in detail the phenomenology of such a Higgs sector of the UED with the Large Hadron Collider (LHC) in focus. We work out relevant decay branching fractions involving the KK-Higgs excitations. Possible production modes of the KK-Higgs bosons are then discussed with an emphasis on their associated production with the third generation KK-quarks and that under the cascade decays of strongly interacting UED excitations which turn out to be the only phenomenologically significant modes. It is pointed out that the collider searches of such Higgs bosons face generic hardship due to soft end-products which result from severe degeneracies in the masses of the involved excitations in the minimal version of the UED (MUED). Generic implications of either observing some or all of the KK-Higgs bosons at the LHC are discussed.

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  1. Priyotosh Bandyopadhyay

    Present address: Korea Institute for Advanced Study (KIAS), Hoegiro 87(207-43 Cheongnyangni-dong), Dongdaemun-gu, 130-722, Seoul, Korea

  2. Biplob Bhattacherjee

    Present address: Tata Institute of Fundamental Research (TIFR), Homi Bhabha Road, 400005, Mumbai, India

Authors and Affiliations

  1. Regional Centre for Accelerator-based Particle Physics (RECAPP), Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, 211019, Allahabad, India

    Priyotosh Bandyopadhyay & AseshKrishna Datta

  2. Department of Physics, University of Calcutta, 92 A.P.C. Road, 700009, Kolkata, India

    Biplob Bhattacherjee

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  1. Priyotosh Bandyopadhyay
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Bandyopadhyay, P., Bhattacherjee, B. & Datta, A. Search for Higgs bosons of the universal extra dimensions at the large Hadron collider. J. High Energ. Phys. 2010, 48 (2010). https://doi.org/10.1007/JHEP03(2010)048

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