Singlets in Composite Higgs Models in light of the LHC di-photon searches

Abstract : Models of compositeness can successfully address the origin of the Higgs boson, as a pseudo-Goldstone of a spontaneously broken global symmetry, and flavour physics via the partial compositeness mechanism. If the dynamics is generated by a simple underlying theory defined in terms of a confining gauge group with fermionic matter content, there exists only a finite set of models that have the correct properties to account for the Higgs and top partners at the same time. As a prediction, one obtains additional light scalars. We explore the theory space of composite Higgs models and establish if the singlet, from the spontaneous breaking of a U(1) symmetry, is compatible with the recent di-photon excess at 750 GeV at the LHC.
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http://hal.in2p3.fr/in2p3-01267457
Contributor : Dominique Girod <>
Submitted on : Thursday, February 4, 2016 - 2:30:02 PM
Last modification on : Thursday, March 15, 2018 - 11:40:10 AM

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A. Belyaev, G. Cacciapaglia, H. Cai, T. Flacke, A. Parolini, et al.. Singlets in Composite Higgs Models in light of the LHC di-photon searches. Physical Review D, American Physical Society, 2016, 94, pp. 015004. ⟨10.1103/PhysRevD.94.015004⟩. ⟨in2p3-01267457⟩

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