The Next-To-Minimal Supersymmetric Standard Model
Author
- IPHC Strasbourg / University of Strasbourg
- fuks@…
- Documentation about the NMSSM implementation in FeynRules is available from here.
Description of the model & references
Our NMSSM implementation in FeynRules is general in the sense that it is keeping all the flavour-violating and helicity-mixing terms in the Lagrangian and also all the possible additional CP-violating phases. In order to deal in a transparent way with the more than 100 parameters, our implementation follows the commonly used universal set of conventions provided by the Supersymmetry Les Houches Accord.
- Phys. Rept. 496 (2010) 1-77: U. Ellwanger, C. Hugonie, A.M.Teixeira, The Next-to-Minimal Supersymmetric Standard Model.
- JHEP 0807 (2008) 002: A. Djouadi et al, Benchmark scenarios for the NMSSM.
- JHEP 0407 (2004) 36: P. Skands et al, SUSY Les Houches accord: Interfacing SUSY spectrum calculators, decay packages, and event generators .
- Comput.Phys.Commun.180 (2009) 8: B. C. Allanach et al, SUSY Les Houches Accord 2.
Model files
- nmssm.fr: MSSM implementation using the superspace module (compatible with FeynRules 1.6.x)
- p1.dat: parameter file to be read, associated to the p1 scenario described in JHEP 0807 (2008) 002. In the case of the Whizard interface, this parameter file must be used instead.
- NMSSM.nb: Example of a Mathematica® notebook loading the model and the parameters.
Specific instructions
- Both Feynman and unitarity gauges are supported.
- The flags $CKMDiag and $MNSDiag, being set to True or False, allow for CKM and PMNS matrices different from the identity or not.
- A parameter file must be loaded before running the model, or all the parameters would have a value of -1 (ReadLHAFile[Input->"myfile"]).
Optimized matrix element generator models for sps1a (removal of all zero terms in the vertices) and TeX interface output
p1_ch.tgz | The model files for CalcHep. |
p1_fa.tgz | The model files for FeynArts. |
p1_mg.tgz | The model files for MadGraph 4. |
p1_ufo.tgz | The model files in UFO format (e.g. for MadGraph 5). |
p1_wo.tgz | The model files for Whizard. |
p1_tex.tgz | LaTeX output. |
The Sherpa interface is not supported.
Validation
- The present NMSSM model has been validated against the first NMSSM implementation in FeynRules, using component fields. We calculate the Feynman rules associated to the difference of the old and the new Lagrangian, and obtains an empty set of rules.
- The old NMSSM implementation has been validated as follow. We have compared of the built-in !Whizard model files with the FeynRules generated ones (CalcHep and MadGraph) through the calculation of various 2 to 2 cross sections. For each implementation, we have fixed all the parameters to those of a specific benchmark point and set the widths of the particles to zero. We have calculated 2 to 2 cross sections related to the production of any pair of particles from a Standard Model initial state of 2x1500 GeV, in unitarity gauge. The results are available here validation.tgz.
Last modified
7 years ago
Last modified on Mar 28, 2018, 11:13:12 PM
Attachments (12)
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p1_tex.tgz
(12.4 KB
) - added by 14 years ago.
Output of the TeX interface
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valid.dat
(22.4 KB
) - added by 14 years ago.
Paramcard used for the validation of the old NMSSM implementation
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validation.tgz
(2.1 MB
) - added by 14 years ago.
Results for the validation of the old NMSSM implementation
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NMSSM.nb
(13.0 KB
) - added by 14 years ago.
Example notebook for the NMSSM
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p1.dat
(22.2 KB
) - added by 14 years ago.
ParamCard for the p1 benchmark point
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p1_wo.dat
(22.2 KB
) - added by 14 years ago.
ParamCard for the p1 benchmark point compatible with Whizard
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p1_ch.tgz
(89.7 KB
) - added by 14 years ago.
CalcHep model files for the p1 point
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p1_mg.tgz
(92.8 KB
) - added by 14 years ago.
MadGraph model files for the p1 point
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p1_wo.tgz
(110.1 KB
) - added by 14 years ago.
Whizard model files for the p1 point
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p1_fa.tgz
(32.2 KB
) - added by 13 years ago.
FeynArts model files for the p1 point
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nmssm.fr
(49.3 KB
) - added by 11 years ago.
NMSSM FR model file
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p1_ufo.tgz
(85.7 KB
) - added by 11 years ago.
NMSSM UFO files for the benchmark point p1
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