Changes between Version 6 and Version 7 of TechniColor
 Timestamp:
 11/26/10 19:59:27 (10 years ago)
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TechniColor
v6 v7 48 48 * AAAAAAAAA.fr is the main !FeynRules file. 49 49 * 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 H GG (Higgs + two nonabelian gauge bosons) raising at loop level.50 * CCCCCCCCC.fr is an extension introducing the effective coupling Hgg (Higgs + two nonabelian gauge bosons) arising at loop level. 51 51 52 52 … … 62 62 === Instructions and details === 63 63 64 The model file is loaded as usual. The attached Mathematica® notebook can be used for this task. *****64 The model file is loaded as usual. The attached Mathematica® notebook can be used for this task. 65 65 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.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. 67 67 '''...Say something about Tuomas HGG''' 68 68 … … 71 71 In addition to the standard model fermions, we thus have the following new particles: 72 72 * Composite Higgs scalar H 73 * Neutral heavy vector R _1^0^73 * Neutral heavy vector R,,1,,^0^ 74 74 * Charged heavy vector R,,1,,^+^, R,,1,,^^ 75 75 * Neutral heavy vector R,,2,,^0^ … … 80 80 Using 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: 81 81 * MA: The spinone mass scale. More precisely, the mass of the axial spinone 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 spinone states with the electroweak gauge bosons, and therefore also the coupling of 83 the composite spinone 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 spinone states with the electroweak gauge bosons, and therefore also the coupling of the composite spinone states to the standard model fermions, is O(g/gt). Allowed values range from about 1 to about 10. 84 83 * S: The (contribution of the lowest spinone 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. 85 84 * MH: The mass of the composite Higgs boson.