Changes between Version 4 and Version 5 of TypeIISeesaw


Ignore:
Timestamp:
11/07/19 03:59:37 (9 months ago)
Author:
BenjF
Comment:

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  • TypeIISeesaw

    v4 v5  
    1010
    1111=== Model Description ===
     12
     13We extend the Standard Model by adding a scalar field lying in the adjoint representation of the weak groupe Δ with an hypercharge equals to 1.  After electroweak symmetry breaking, this gives rise to one extra CP-even scalar Higgs Δ^0^, one charged scalar Δ^±^ and one doubly-charged scalar Δ^±±^ that are mostly of a triplet nature. The corresponding Lagrangian reads
     14{{{
     15#!latex
     16\begin{equation}
     17  \mathcal{L} = \mathcal{L}_{\rm SM} +  {\rm Tr}\big[D_\mu \hat\Delta^\dag D^\mu\hat\Delta\big] - V_\Delta + \mathcal{L}_{{\rm Y}_\Delta}
     18\end{equation}
     19}}}
     20where the extra terms respectively represents the gauge-invariant kinetic terms for the triplet, the extra pieces to the scalar potential and the Yukawa interactions giving rise to neutrino masses. The above Lagrangian was implemented in the Feynman Gauge into !FeynRules 2.3.35. QCD renormalization and R2 rational counter terms were determined using MoGRe v1.1, NLOCT v1.02 and !FeynArts 3.9. Feynman rules were collected into a single UFO, available below. In the UFO file, five massless quarks are assumed as are zero off-diagonal CKM matrix entries.
     21These additions permit tree-level calculations at LO and NLO in QCD and loop-induced calculations at LO in QCD using MadGraph_aMC@NLO.