23-25 May 2016
Edificio Carolino, Benemérita Universidad Autónoma de Puebla
Mexico/General timezone
Contribution Oral contribution
Has a Higgs-flavon with a $750$ GeV mass been detected at the LHC13?
Speakers
- Dr. Azucena BOLAÑOS
Primary authors
- Dr. Azucena BOLAÑOS (Facultad de Física UV)
Co-authors
- Prof. Lorenzo DIAZ-CRUZ (FCFM-BUAP)
- Dr. Gilberto TAVARES (FCFM BUAP)
- Gerardo HERNÁNDEZ-TOMÉ (Facultad de Ciencias Físico-Matemáticas. Benemérita Universidad Autónoma de Puebla)
Description
Higgs-flavon fields appear as part of the Froggart-Nielsen (FN) mechanism, which attempts to explain the hierarchy of
Yukawa couplings. We explore the possibility that the 750 GeV diphoton
resonance recently reported at the LHC13, could be identified with a low-scale Higgs-flavon field $H_F$.
We work within an extension of the standard model (SM) that contains two Higgs doublets (a standard one and an inert one) and one complex
FN singlet. The inert doublet includes a stable neutral boson, which provides a viable dark matter candidate, while
the mixing of the standard doublet and the FN singlet induces flavor violation in the Higgs sector at the tree-level.
Constraints on the parameters of the model are derived from the LHC Higgs data, which include the
search for the lepton flavor violating decay of the SM Higgs boson $h\to \bar{\mu}\tau $. We also identify the viable parameter space that
can reproduce the profile of the 750 GeV diphoton signal; in particular, the heavy fermions from the ultraviolet completion
of the FN mechanism must play an important role to reproduce the large width of the signal.
In addition, we find that the model predicts a large branching ratio for the $H_F \to hh$ decay, of the order of 0.1,
which should be searched for at the LHC13 to test this model.