A tale of two Higgs
arXiv:1302.7215 · doi:10.1007/JHEP09(2013)118
Abstract
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* to 4 leptons and the diphoton 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 tanβ. 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 \bar b and tau tau rates, which will be useful in excluding the two-resonance scenario.
6 pages, 1 figure
References in corpus (8)
- Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
- Higgs After the Discovery: A Status Report
- Search for heavy bottom-like quarks in 4.9 inverse femtobarns of pp collisions at sqrt(s) = 7 TeV
- Diagnosing Degenerate Higgs Bosons at 125 GeV
- Pseudoscalar Higgs Bosons at the LHC: Production and Decays into Electroweak Gauge Bosons Revisited
- Search for pair production of a new quark that decays to a Z boson and a bottom quark with the ATLAS detector
- Light Higgs boson discovery from fermion mixing
- How to test for mass degenerate Higgs resonances