Composite Higgs search at the LHC

Open Access


The Higgs boson production cross-sections and decay rates depend, within the Standard Model (SM), on a single unknown parameter, the Higgs mass. In composite Higgs models where the Higgs boson emerges as a pseudo-Goldstone boson from a strongly-interacting sector, additional parameters control the Higgs properties which then deviate from the SM ones. These deviations modify the LEP and Tevatron exclusion bounds and significantly affect the searches for the Higgs boson at the LHC. In some cases, all the Higgs couplings are reduced, which results in deterioration of the Higgs searches but the deviations of the Higgs couplings can also allow for an enhancement of the gluon-fusion production channel, leading to higher statistical significances. The search in the Hγγ channel can also be substantially improved due to an enhancement of the branching fraction for the decay of the Higgs boson into a pair of photons.


Higgs Physics Beyond Standard Model Hadronic Colliders 


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Authors and Affiliations

  • J. R. Espinosa
    • 1
    • 2
  • C. Grojean
    • 2
    • 3
  • M. Mühlleitner
    • 4
  1. 1.ICREA, Instituciò Catalana de Recerca i Estudis AvançatsIFAE, Universitat Autònoma de BarcelonaBellaterra, BarcelonaSpain
  2. 2.CERN, Physics Department, Theory UnitGeneva 23Switzerland
  3. 3.Institut de Physique Théorique, CEA SaclayGif-sur-YvetteFrance
  4. 4.Institut für Theoretische PhysikKarlsruhe Institut of TechnologyKarlsruheGermany

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