Changes between Version 2 and Version 3 of GGG


Ignore:
Timestamp:
Jun 13, 2018 12:31:39 PM (5 days ago)
Author:
valentin.hirschi
Comment:

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  • GGG

    v2 v3  
    22== Description of the model & reference
    33
    4 $\mathcal{M}_{\Gamma=0}$This model corresponds to the standard model amended with the following two operators:
     4This model corresponds to the standard model amended with the following two operators (G is the gluon field strength tensor):
    55
    6 ajaj $O_{GGG}=g_s f_{abc} G^{a,\mu}_\nu G^{b,\nu}_\rho G^{c,\rho}_\mu\ $ shsh
     6GGG and DGDG
     7
     8with like-named associated coupling orders. The second operator involving the covariant derivative is typically not relevant as it is often rotated away in the basis using the equations of motion.
     9The reference publication using this model is [ToAppear To appear], which also provides the validation material.
    710
    811== Model files
    912
     13We provide here the [/attachment/wiki/NLOModels/GGG_EFT_up_to_4point_loops.tar.gz UFO library] for this model is available and the original [/attachment/wiki/NLOModels/GGG.fr .fr model file].
     14
     15We stress that due to the complexity of the colour and Lorentz structures, not all counterterms have been computed and included in the model, but '''only those for one-loops connected to at most four gluons'''.
     16
     17Also, the length of the name of some fortran subroutines generated from this model will prevent their compilation, and this problem is only fixed in '''MG5_aMC v2.6.3+''', so check the version of your MG5_aMC distribution to ensure compatibility.
     18
    1019== Validation
     20
     21The analytical expression for the squared one-loop interference amplitudes of order O(1/\Lambda^2), given in Eq. A.16 of the [ToAppear reference paper] can be numerically compared to [https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/MadLoopStandaloneLibrary MadLoop] output using this model.
     22
     23The cross-sections given in Table 6 of that paper can also be reproduced directly using MG5_aMC.