This page contains the discussion of the flavorful 2HDM, as proposed in this paper. The idea is that the mass of the light quark and lepton generations arises from a second Higgs doublet. The phenomenology is very distinct from the phenomenology of Type I-IV 2HDMs. We propose the search of the additional Higgs bosons (A, H, H^\pm) arising in this model.

Benchmark models and couplings

The phenomenology of the model is fixed by the following parameters: cos(alpha-beta), m_A, m_H, m_{H^\pm}, tan(beta). There is additional dependence on the precise Yukawa texture of the second Higgs doublet. The dependence is mild for flavor diagonal Higgs couplings but significantly affects the flavor violating couplings. See this paper for the Yukawa texture.

The couplings of the heavy Higgses break flavor universality and, in particular, the neutral Higgs couplings are given by

(Note that these expressions are valid neglecting terms suppressed by small second/third generation mass ratios.)

To simplify the parameter space, we propose to impose the alignment limit

This condition on the parameters keeps the most interesting features of the model.

Branching ratios and cross sections

Here you can find the branching ratios and the cross sections for the heavy scalar, H, and for the charged Higgs for a few different benchmarks:

Charged Higgs:

In this files, we report the several cross sections, having fixed the following benchmarks:

- tanbeta=10 https://twiki.cern.ch/twiki/pub/LHCPhysics/LHCHWG3Flavorful2HDM/Tanbeta10MCharged.zip;

- tanbeta=50 https://twiki.cern.ch/twiki/pub/LHCPhysics/LHCHWG3Flavorful2HDM/Tanbeta50MCharged.zip;

- m_{H^\pm}=130 GeV https://twiki.cern.ch/twiki/pub/LHCPhysics/LHCHWG3Flavorful2HDM/MCharged130GeVTanbeta.zip;

- m_{H^\pm}=500 GeV https://twiki.cern.ch/twiki/pub/LHCPhysics/LHCHWG3Flavorful2HDM/MCharged500GeVTanbeta.zip,

where in the first two cases we show the cross sections as a function of m_{H^\pm}, in the last two cases as a function of tanbeta.

It is interesting to note that the quark-quark fusion cross section is very important in this model.

Here we report the branching ratios of the charged Higgs, again having fixed tanbeta=10, tanbeta=50, m_{H^\pm}=130 GeV, or m_{H^\pm}=500 GeV https://twiki.cern.ch/twiki/pub/LHCPhysics/LHCHWG3Flavorful2HDM/BRCharged.zip.

Neutral Higgs:

In this files, we report the several cross sections, having fixed tanbeta=10, tanbeta=50, or m_H=500 GeV https://twiki.cern.ch/twiki/pub/LHCPhysics/LHCHWG3Flavorful2HDM/SigmaNeutral.zip;

Here are the corresponding branching ratios https://twiki.cern.ch/twiki/pub/LHCPhysics/LHCHWG3Flavorful2HDM/BRNeutral.zip.

Contact people

Josh Eby (joshaeby@gmailNOSPAMPLEASE.com), Stefania Gori (stefaniagori83@gmailNOSPAMPLEASE.com), Douglas Tuckler (tuckleds@mailNOSPAMPLEASE.uc.edu).

-- StefaniaGori - 2017-06-20