Changes between Version 4 and Version 5 of VLQ_tbdoubletvl


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Timestamp:
07/03/13 10:30:23 (6 years ago)
Author:
buchkremer
Comment:

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  • VLQ_tbdoubletvl

    v4 v5  
    2020   
    2121    == Description & Model Implementation ==
    22 This model is an simplified version of the VLQ FeynRules model, including a single vector-like (T,B) doublet (Q=2/3, -1/3), with non-zero mixings to the first and third generation SM quarks [1] [2] [3]. The pattern of allowed couplings is such that T decays 50% to Z and H bosons, while B decays 100% in W bosons in the asymptotic limit where their (degenerate) masses go to infinity, in agreement with what is expected from the Goldstone equivalence theorem. The corresponding FeynRules implementation is based on the VLQ.fr model description, which provides a direct connection between experimental observables and the new quark couplings. The model file [attachment:tbdoubletvl.fr.zip] adds the following interactions to the SM Lagrangian:[[Image(TBDoublet.png)]]
     22This model is an simplified version of the VLQ FeynRules model, including a single vector-like (T,B) doublet (Q=2/3, -1/3), with non-zero mixings to the first and third generation SM quarks [1] [2] [3]. The pattern of allowed couplings is such that T decays 50% to Z and H bosons, while B decays 100% in W bosons in the asymptotic limit where their (degenerate) masses go to infinity, in agreement with what is expected from the Goldstone equivalence theorem. The corresponding FeynRules implementation is based on the VLQ.fr model description, which provides a direct connection between experimental observables and the new quark couplings. The model file [attachment:tbdoubletvl.fr.zip] adds the following interactions to the SM Lagrangian:[[Image(TBDoublet2.png)]]
    2323
    2424The associated electromagnetic and strong interactions are also included, together with the T and B quarks kinetic and mass terms. The user-defined parameters, summarised in [attachment:Parameters.pdf], consist of: