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Higgs data confronts sequential fourth generation fermions in the Higgs triplet model

Shankha Banerjee1,*, Mariana Frank2,†, and Santosh Kumar Rai1,‡

  • 1Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad 211019, India
  • 2Department of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6, Canada

  • *shankha@hri.res.in
  • †mfrank@alcor.concordia.ca
  • ‡skrai@hri.res.in
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Phys. Rev. D 89, 075005 – Published 3 April, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.075005

Abstract

We investigate the effect of introducing a sequential generation of chiral fermions in the Higgs triplet model with nontrivial mixing between the doublet and triplet Higgs. We use the available Large Hadron Collider data for Higgs boson production and decay rates, the constraints on the fourth generation masses, and impose electroweak precision constraints from the S, T and U parameters. Our analysis shows that a standard model (SM)–like Higgs boson state at ∼125  GeV can be accommodated in the Higgs triplet model with four generations, and thus, that four generations survive collider and electroweak precision constraints in models beyond SM.

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Phys. Rev. D 89, 075005– Published 3 April, 2014
  • Received 20 December 2013

© 2014 American Physical Society

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