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Scalar septuplet dark matter and enhanced h → γγ decay rate

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Abstract

Inspired by recent results on the Higgs search from ATLAS and CMS, we extend the SM with complex septuplet scalars. The lightest neutral component of the septuplets is a natural cold dark Matter candidate and the charged components can contribute to the h → γγ decay rate, providing a significant enhancement factor. The dark matter phenomenology and possible collider signatures of the model are investigated. We find a dark matter candidate with mass around 70 GeV consistent with astrophysical and direct detection constraints. In the meanwhile, the enhancement factor of h → γγ decay rate can be in the range 1.5 ~ 1.65.

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Author information

Authors and Affiliations

  1. INPAC, Shanghai Jiao Tong University, Shanghai, P.R. China

    Yi Cai & Wei Chao

  2. Department of Physics, University of Wisconsin-Madison, Madison, WI, 53706, U.S.A

    Wei Chao

  3. Physics Department, Dalian University, Dalian, 116622, P.R. China

    Shuo Yang

  4. Center for High Energy Physics, Peking University, Beijing, 100871, P.R. China

    Shuo Yang

  5. Kavli Institute for Theoretical Physics China, CAS, Beijing, 100190, P.R. China

    Yi Cai, Wei Chao & Shuo Yang

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  1. Yi Cai
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  2. Wei Chao
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  3. Shuo Yang
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Correspondence to Shuo Yang.

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ArXiv ePrint: 1208.3949

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Cai, Y., Chao, W. & Yang, S. Scalar septuplet dark matter and enhanced h → γγ decay rate. J. High Energ. Phys. 2012, 43 (2012). https://doi.org/10.1007/JHEP12(2012)043

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  • DOI: https://doi.org/10.1007/JHEP12(2012)043

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