Changes between Version 11 and Version 12 of SMEFT


Ignore:
Timestamp:
Sep 14, 2017, 7:44:41 PM (7 years ago)
Author:
YunJiang
Comment:

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  • SMEFT

    v11 v12  
    1 == '''Standard Model Effective Field Theory  (SMEFT)''' ==
     1= '''Standard Model Effective Field Theory  (SMEFT) sim''' =
    22
    3 '''Authors'''
     3== Authors ==
    44
    55Ilaria Bravio, Yun Jiang and Micheal Trott
    … …  
    1313----
    1414
    15 '''The model description''
     15== The model description ==
    1616
    17 The SMEFT is constructed out of a series of SUC(3) × SUL(2) × UY(1) invariant (local and analytic) higher dimensional operators built out of the SM fields.
     17The SMEFT is constructed out of a series of SU(3),,C,, × SU(2),,L,, × U(1),,Y,, invariant (local and analytic) higher dimensional operators L,,6,,, L,,7,,, ... built out of the SM fields.
    1818
    19 The main purpose of the SMEFTsim package is to provide a complete tool for the analysis of the tree level interference terms between the $L_{6}$ dependent amplitude and the SM amplitudes in a measured process.
     19The SMEFTsim package is to provide a complete tool for the analysis of the tree level interference terms between the L,,6,, dependent amplitude and the SM amplitudes in a measured process. In this spirit, we stress that this package is neither to be employed for the extraction of accurate SM predictions nor equipped for NLO calculations in MadGraph5_aMC@NLO.
    2020
    21 The implementation of the entire parameter space of the SMEFT and the automatic inclusion of the shifts due to the choice of an input parameters set is a key feature.
     21Two independent sets are supplied in the SMEFTsim package. Each one consists three different versions of the SMEFT based on the flavor symmetry assumption adopted:
     22* a fully flavour general SMEFT
     23* a U(3)^5^ − SMEFT with non-SM complex phases
     24* Minimal flavor violation (MFV) SMEFT
    2225
    23 In this spirit, the models are not meant to be employed for the extraction of accurate SM predictions and they are not equipped for NLO calculations in MadGraph5_aMC@NLO.
     26The models are built upon the default SM implementation in FeynRules, from which they inherit the SM fields, parameters and Lagrangian definitions. The original file has been extended and modified to include the complete set of L,,6,, baryon number conserving operators of the Warsaw basis. The loop-induced effective couplings of SM Higgs to gg, γγ and Zγ have also been included. At this stage, the ghost Lagrangian has been left in its SM form. The entire parameter space of the L,,6,, SMEFT and the automatic inclusion of the shifts due to the choice of an input parameters set are implemented.
    2427
    25 The SMEFTsim package consists of several model files for the tree-level analysis of the SMEFT at d = 6. It contains both model files for FeynRules [6] and pre-exported UFO files [5] to be interfaced e.g. with MadGraph5_aMC@NLO [83].
    26 Two independent models sets are supplied, called “Models set A” and “Models set B”: each contains three different versions of the SMEFT: a fully flavour general SMEFT, a U(3)5 − SMEFT with non-SM complex phases and MFV − SMEFT.12 In addition, each case has
     28Each set contains a single master code and a number of subroutines, along with several restriction files.
     29The model file can be loaded in FeynRules using the notebook program, with the product of the UFOs.
     30Model files and pre-exported UFO files to be interfaced with MadGraph5_aMC@NLO can be downloaded on this page.
    2731
    28 All the models are built upon the default SM implementation in FeynRules, from which they inherit the SM fields, parameters and Lagrangian definitions. The original file has been extended and modified to include the complete set of L(6) baryon number conserving operators of the Warsaw basis. The loop-induced effective couplings of SM Higgs to gg, γγ and Zγ have also been included. At this stage, the ghost Lagrangian has been left in its SM form.
    2932
    30 '''Change log'''
     33== Change log ==
    3134
    32 v1.0 (14.09.2017) The first version released
     35v1.0 (17.09.2017) The first version released
    3336
    34 '''References'''
     37== References ==
    3538
    36 I. Bravio, Y. Jiang and M. Trott, ''The SMEFTsim package, theory and tools'', arXiv:1709.XXXX
     39* I. Bravio, Y. Jiang and M. Trott, ''The SMEFTsim package, theory and tools'', arXiv:1709.XXXX
    3740
    3841----
    … …  
    4043'''Model Set A'''
    4144
     45
    4246'''Model Set B''
    4347
     48In the master code two flags: Scheme and Flavor are established, which are used to identify the input scheme and flavor symmetry being adopted in loading the model.
    4449
    45 '''UFO generated files'''
    46 
     50* This archive contains all the model files. Should be expanded in the FR model directory.
     51* Example of a Mathematica® notebook loading the model
    4752
    4853----
    4954
    50 
    51 
     55== UFO generated files ==
     56 
     57||                          ||    Set A  ||       Set B ||
     58|| Flavor general SMEFT  ||  ||  ||                             
     59|| MFV  SMEFT       ||  ||  || 
     60|| U(3)^5^ SMEFT     ||  ||  ||