Changes between Version 6 and Version 7 of TechniColor


Ignore:
Timestamp:
11/26/10 19:59:27 (10 years ago)
Author:
CP3-Origins
Comment:

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  • TechniColor

    v6 v7  
    4848* AAAAAAAAA.fr is the main !FeynRules file.
    4949* BBBBBBBBB.nb is a Mathematica® notebook that can be used to load the MWT FeynRules model.
    50 * CCCCCCCCC.fr is an extension introducing the effective coupling HGG (Higgs + two non-abelian gauge bosons) raising at loop level.
     50* CCCCCCCCC.fr is an extension introducing the effective coupling Hgg (Higgs + two non-abelian gauge bosons) arising at loop level.
    5151
    5252
     
    6262=== Instructions and details ===
    6363
    64 The model file is loaded as usual. The attached Mathematica® notebook can be used for this task.*****
     64The model file is loaded as usual. The attached Mathematica® notebook can be used for this task.
    6565
    66 The calculator is needed by the MadGraph implementation in order to change the parameters of the model. The directory is provided by a README file with the instructions on the usage.
     66The calculator is needed by the !MadGraph implementation in order to change the parameters of the model. The directory is provided by a README file with the instructions on the usage.
    6767'''...Say something about Tuomas HGG'''
    6868
     
    7171In addition to the standard model fermions, we thus have the following new particles:
    7272* Composite Higgs scalar H
    73 * Neutral heavy vector R_1^0^
     73* Neutral heavy vector R,,1,,^0^
    7474* Charged heavy vector R,,1,,^+^, R,,1,,^-^
    7575* Neutral heavy vector R,,2,,^0^
     
    8080Using the effective theory introduces several new coupling constants. These can be constrained by linking to the underlying gauge theory via the Weinberg sum rules and the definition of the electroweak S parameter. After taking into account the Weinberg sum rules, the free parameters can be expressed in terms of:
    8181* MA: The spin-one mass scale. More precisely, the mass of the axial spin-one state in the limit where the electroweak interactions are turned off. Allowed range is from about 500 GeV to about 3 TeV, depending on the values of other parameters.
    82 * gt: The effective strength of technicolor interactions. Parametrizes the corrections of the electroweak interactions to the technicolor sector, which are typically O(g/gt), with g being the weak coupling constant. In particular, the mixing of the composite spin-one states with the electroweak gauge bosons, and therefore also the coupling of
    83 the composite spin-one states to the standard model fermions, is O(g/gt). Allowed values range from about 1 to about 10.
     82* gt: The effective strength of technicolor interactions. Parametrizes the corrections of the electroweak interactions to the technicolor sector, which are typically O(g/gt), with g being the weak coupling constant. In particular, the mixing of the composite spin-one states with the electroweak gauge bosons, and therefore also the coupling of the composite spin-one states to the standard model fermions, is O(g/gt). Allowed values range from about 1 to about 10.
    8483* S: The (contribution of the lowest spin-one states to the) S parameter. Recommended values come from naive estimates of the S parameter (calculation of techniquark loops), which gives S=0.15 for MWT and S=0.3 for NMWT.
    8584* MH: The mass of the composite Higgs boson.