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Spinless photon dark matter from two universal extra dimensions

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arxiv 0706.3409 v2 pith:HKQTTVNS submitted 2007-06-25 hep-ph astro-ph

Bogdan A. Dobrescu , Dan Hooper , Kyoungchul Kong , Rakhi Mahbubani This is my paper · ORCID
classification hep-phastro-ph
keywords photondarkextramatterspinlessdimensionskaluza-kleinuniversal
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We explore the properties of dark matter in theories with two universal extra dimensions, where the lightest Kaluza-Klein state is a spin-0 neutral particle, representing a six-dimensional photon polarized along the extra dimensions. Annihilation of this 'spinless photon' proceeds predominantly through Higgs boson exchange, and is largely independent of other Kaluza-Klein particles. The measured relic abundance sets an upper limit on the spinless photon mass of 500 GeV, which decreases to almost 200 GeV if the Higgs boson is light. The phenomenology of this dark matter candidate is strikingly different from Kaluza-Klein dark matter in theories with one universal extra dimension. Elastic scattering of the spinless photon with quarks is helicity suppressed, making its direct detection challenging, although possible at upcoming experiments. The prospects for indirect detection with gamma rays and antimatter are similar to those of neutralinos. The rates predicted at neutrino telescopes are below the sensitivity of next-generation experiments.

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  1. Revisiting Universal Extra-Dimension Model with Gravity Mediated Decays

    hep-ph 2024-12 conditional novelty 5.0 of 10

    Existing LHC data exclude fat-brane mUED compactification scales below about 3 TeV, and ML-tagged searches at 500 fb^-1 could extend the reach to roughly 3.2 to 3.4 TeV.

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