Last modified 7 years ago
Last modified on 04/11/11 18:53:43
The NextToMinimal Supersymmetric Standard Model
Author
 IPHC Strasbourg / University of Strasbourg
 fuks@…
Description of the model & references
Our NMSSM implementation in FeynRules is general in the sense that it is keeping all the flavourviolating and helicitymixing terms in the Lagrangian and also all the possible additional CPviolating 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) 177: U. Ellwanger, C. Hugonie, A.M.Teixeira, The NexttoMinimal 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 builtin !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.
Attachments

p1_tex.tgz
(12.4 KB) 
added by BenjF 7 years ago.
Output of the TeX interface

valid.dat
(22.4 KB) 
added by BenjF 7 years ago.
Paramcard used for the validation of the old NMSSM implementation

validation.tgz
(2.1 MB) 
added by BenjF 7 years ago.
Results for the validation of the old NMSSM implementation

NMSSM.nb
(13.0 KB) 
added by BenjF 7 years ago.
Example notebook for the NMSSM

p1.dat
(22.2 KB) 
added by BenjF 7 years ago.
ParamCard for the p1 benchmark point

p1_wo.dat
(22.2 KB) 
added by BenjF 7 years ago.
ParamCard for the p1 benchmark point compatible with Whizard

p1_ch.tgz
(89.7 KB) 
added by BenjF 7 years ago.
CalcHep model files for the p1 point

p1_mg.tgz
(92.8 KB) 
added by BenjF 7 years ago.
MadGraph model files for the p1 point

p1_wo.tgz
(110.1 KB) 
added by BenjF 7 years ago.
Whizard model files for the p1 point

p1_fa.tgz
(32.2 KB) 
added by BenjF 7 years ago.
FeynArts model files for the p1 point

nmssm.fr
(49.3 KB) 
added by BenjF 5 years ago.
NMSSM FR model file

p1_ufo.tgz
(85.7 KB) 
added by BenjF 5 years ago.
NMSSM UFO files for the benchmark point p1