2007

Universal Doublet-Singlet Higgs Couplings and phenomenology at the CERN Large Hadron Collider

Bhattacharyya, Gautam, Branco, Gustavo C., Nandi, S.

Understand

We consider a minimal extension of the standard model where a real, gauge singlet scalar field is added to the standard spectrum.

  • Introducing the Ansatz of universality of scalar couplings, we are led to a scenario which has a set of very distinctive and testable predictions: (i) the mixing between the standard model Higgs and the new state is near maximal, (ii) the ratio of the two Higgs mass eigenstates is fixed ($\sim \sqrt{3}$), (iii) the decay modes of each of the two eigenstates are standard model like.
  • We also study how electroweak precision tests constrain this scenario.
  • We predict the lighter Higgs to lie in the range of 114 and 145 GeV, and hence the heavier one between 198 and 250 GeV.

Built on

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  • G. C. Branco, J. I. Silva-Marcos and M. N. Rebelo, Phys. Lett. B 237

    1995

    Earlier work this paper cites.

  • I. Gogoladze, Y. Mimura and S. Nandi, Phys. Rev. Lett. 91

    2003

    Earlier work this paper cites.

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