Version 16 (modified by 14 years ago) ( diff ) | ,
---|
Type III Seesaw
Authors
- Carla Biggio
- Institut de Fisica d'Altes Energies (IFAE), Universitat Autonoma de Barcelona (UAB), Spain
- email: biggio _at_ ifae.es
- Florian Bonnet
- INFN-Padova
- email: florian.bonnet _at_ pd.infn.it
Model Description
This model describes the minimal realisation of the Type III Seesaw. It is an extension of the SM where a fermionic triplet is add to the matter content. The fermionic triplet is introduced under the form of a heavy Dirac charged lepton tr+/- and a heavy Majorana neutral lepton tr0.
References
- "mu->e gamma and tau->l gamma decays in the fermion triplet seesaw", A. Abada, C. Biggio, F. Bonnet, B. Gavela, T. Hambye, Phys. Rev. D78 (2008) 033007.
- "Implementation of the Type III Seesaw model in FeynRules/MadGraph and prospect for discovery with LHC data", C. Biggio, F. Bonnet, xxxxx
Model Files
- typeIIIseesaw1.0.fr: this is the file containing the model
- For
MadGraph/MadEvent
and BRIDGE users: formats.inc: this is a modified version of the file formats.inc, that can be useful when dealing with small mixing angles (the original file sets to zero couplings smaller than 10-5)
- typeIIIseesaw.nb: this is a Mathematica notebook that loads the model and export it to the
MadGraph
andCalcHep
format.
Validation
In order to validate the implementation of the model we have checked several processes:
- Comparison with the
FeynRules
generated Standard Model inMadGraph
(sm_FR
) of SM 2-to-2 processes :- l+l- -> ll
- l+l- -> VV
- VV -> VV
- HH -> VV
- GG -> GG
- qq~ -> qq~
- qq~ -> VV
- qq~ -> GG
- Comparison with the
FeynRules
generated Standard Model inMadGraph
(sm_FR
) of SM particles decay widths and branching ratios calculated with BRIDGE
- Comparison with the theoretical predictions (see Phys.Rev D78 (2008) 033002 and draft) of the branching ratios calculated with BRIDGE
- Comparison with previous studies (see Phys.Rev D78 (2008) 033002) of the production cross section of a pair of triplets at the LHC with 14 TeV as center-of-mass energy:
- pp -> tr+tr-
- pp -> tr+/-tr0
Details of the validation procedure can be found in the related notice draft.
Notes
We implemented the couplings to Goldstone bosons so the implmentation allows for the use of Feynman gauge. We have checked that the exportation to the CalcHep
format is successfull however we did not check the CalcHep
output.
Attachments (4)
-
formats.inc
(957 bytes
) - added by 14 years ago.
formats.inc
-
typeIIIseesaw.nb
(12.2 KB
) - added by 14 years ago.
Mathematica notebook
-
typeIIIseesaw1.0.fr
(55.2 KB
) - added by 13 years ago.
TypeIIIseesaw1.0
- typeIIIseesaw1.1.fr (55.2 KB ) - added by 12 years ago.
Download all attachments as: .zip