A composite scalar hint from di-boson resonances?

Abstract : We study the light scalar resonance sector of a composite Higgs model UV embedding based on the coset $SU(4)/Sp(4)$. Beyond the Higgs multiplet, the pseudo Nambu-Goldstone sector of this model contains Standard Model singlets which couple to the Standard Model gauge bosons through Wess-Zumino-Witten anomaly terms. They can thus be produced in gluon fusion and decay into either gluons or pairs of electroweak gauge bosons $WW$, $ZZ$, $Z\gamma$, or $\gamma\gamma$. In this letter we show that one of the pseudo Nambu-Goldstone boson states has appropriate couplings in order to explain a di-boson excess in the $WW$ channel whilst not being excluded by LHC run I bounds on the di-jet, $Z\gamma$ and $\gamma\gamma$ decay channels. A di-boson resonance production cross section of $\sim$ 10 fb at LHC run I is not a prediction of the model, but can be obtained if the confining gauge group is of high rank.
Type de document :
Pré-publication, Document de travail
5 pages, 3 figures, 2 tables. 2016
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Contributeur : Dominique Girod <>
Soumis le : jeudi 4 février 2016 - 14:27:04
Dernière modification le : jeudi 15 mars 2018 - 11:40:10

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  • HAL Id : in2p3-01267450, version 1
  • ARXIV : 1512.04508



H. Cai, T. Flacke, M. Lespinasse. A composite scalar hint from di-boson resonances?. 5 pages, 3 figures, 2 tables. 2016. 〈in2p3-01267450〉



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