Changes between Version 8 and Version 9 of SMEFT


Ignore:
Timestamp:
09/14/17 19:02:45 (2 years ago)
Author:
YunJiang
Comment:

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  • SMEFT

    v8 v9  
    33'''Authors'''
    44
    5 I. Bravio, Yun Jiang and Micheal Trott
     5Ilaria Bravio, Yun Jiang and Micheal Trott
    66
    7 "ilaria.brivio@nbi.ku.dk", "yunjiagn@nbi.ku.dk"
     7"ilaria.brivio@nbi.ku.dk", "yunjiagn@nbi.ku.dk", "michael.trott@cern.ch"
    88
    99''NBIA and Discovery Center, Niels Bohr Institute, University of Copenhagen''
    1010
     11
    1112'''The model description''
    12 
    1313
    1414The 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.
    1515
    16 The main purpose of the SMEFTsim package is to provide a complete tool for the analysis of the tree level interference terms between the $L_{d=6}$ dependent amplitude and the SM amplitudes in a measured process. The implementation of the entire parameter space of the SMEFT and the automatic inclusion of the shifts due to the choice of an input parame- ters set is a key feature. 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.
     16The 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.
     17
     18The 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.
     19
     20In 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.
    1721
    1822The 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].
    1923Two 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
    2024
    21 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 [8] and the input numbers have been updated according to Table 2. The loop-induced effective couplings of SM Higgs to gg, γγ and Zγ have also been included, as detailed in the previous Section At this stage, the ghost Lagrangian has been left in its SM form. As a consequence the models give valid results only in unitary gauge, so $FeynmanGauge = False has been enforced in all cases.
     25All 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.
    2226
    2327'''References'''
    2428
    25 I. Bravio, Y. Jiang and M. Trott, The SMEFTsim package, theory and tools, arXiv:1709.XXXX
     29I. Bravio, Y. Jiang and M. Trott, ''The SMEFTsim package, theory and tools'', arXiv:1709.XXXX
    2630
    27 This is the FeynRules mod-file for the Standard model Effective Field Theory
    2831
    2932'''Model Set A'''