Journal of High Energy Physics

, 2013:118 | Cite as

A tale of two Higgs

  • Aielet Efrati
  • Daniel Grossman
  • Yonit Hochberg


A new boson with mass ~125 GeV and properties similar to the Standard Model Higgs has been discovered by both the ATLAS and CMS collaborations, with significant observation in the ZZ → 4 and γγ channels. In this work we ask whether the signals in these two channels can be due primarily to two distinct resonances, each contributing dominantly to one channel. We investigate this question in the framework of a 2HDM and several of its extensions. We conservatively find that such a scenario is not possible in a pure 2HDM, nor under the addition of vector-like quarks, but is allowed when adding one or two top-like scalars, if one allows for sub-one tan β. The resonances in the diboson and diphoton channels can then be two scalars, or a scalar and a pseudoscalar, respectively. In each viable case, we further find the expected future deviations in the diboson, diphoton, \( b\overline{b} \) and ττ rates, which will be useful in excluding the two-resonance scenario.


Higgs Physics Beyond Standard Model 


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Copyright information

© SISSA, Trieste, Italy 2013

Authors and Affiliations

  • Aielet Efrati
    • 1
  • Daniel Grossman
    • 1
  • Yonit Hochberg
    • 1
  1. 1.Department of Particle Physics and AstrophysicsWeizmann Institute of ScienceRehovotIsrael

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