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Strange couplings to the Higgs

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Abstract

We explore the coupling of the strange quark to the state of mass close to 126 GeV recently observed by the ATLAS and CMS experiments at the LHC. An enhanced coupling relative to the expectations for a SM Higgs has the effect of increasing both the inclusive production cross section and the partial decay width into jets. For very large modifications, the latter dominates and the net rate into non-jet decay modes such as diphotons is suppressed, with the result that one can use observations of the diphoton decay mode to place an upper limit on the strange quark coupling. We find that the current observations of the diphoton decay mode imply that the coupling of the new resonance to strange quarks can be at most ~ 50 times the SM expectation at the 95% C.L., if one assumes at most a \( \mathcal{O}(1) \) modification of the coupling to gluons.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University of California, Irvine, CA, 92697, U.S.A.

    Yanzhi Meng, Arvind Rajaraman, Ze’ev Surujon & Tim M. P. Tait

  2. C. N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, NY, 11794, U.S.A.

    Ze’ev Surujon

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  1. Yanzhi Meng
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  2. Arvind Rajaraman
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  3. Ze’ev Surujon
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  4. Tim M. P. Tait
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Correspondence to Yanzhi Meng.

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ArXiv ePrint: 1210.3373

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Meng, Y., Rajaraman, A., Surujon, Z. et al. Strange couplings to the Higgs. J. High Energ. Phys. 2013, 138 (2013). https://doi.org/10.1007/JHEP02(2013)138

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  • DOI: https://doi.org/10.1007/JHEP02(2013)138

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