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Probing variant axion models at LHC

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Abstract

We study collider implications of variant axion models which naturally avoid the cosmological domain wall problem. We find that in such models the branching ratio of h → γγ can be enhanced by a factor of 5 up to 30 as compared with the standard model prediction. The h → γγ process is therefore a promising channel to discover a light Higgs boson at the LHC and to probe the Peccei-Quinn charge assignment of the standard model fields from Yukawa interactions.

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Authors and Affiliations

  1. Institute for the Physics and Mathematics of the Universe, University of Tokyo, Chiba, 277-8583, Japan

    Chuan-Ren Chen, Paul H. Frampton, Fuminobu Takahashi & Tsutomu T. Yanagida

  2. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC, 27599-3255, U.S.A.

    Paul H. Frampton

  3. Department of Physics, University of Tokyo, Tokyo, 113-0033, Japan

    Tsutomu T. Yanagida

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  1. Chuan-Ren Chen
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  2. Paul H. Frampton
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  4. Tsutomu T. Yanagida
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Correspondence to Chuan-Ren Chen.

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ArXiv ePrint: 1005.1185

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Chen, CR., Frampton, P.H., Takahashi, F. et al. Probing variant axion models at LHC. J. High Energ. Phys. 2010, 59 (2010). https://doi.org/10.1007/JHEP06(2010)059

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