Changes between Version 8 and Version 9 of VLQ_tsingletvl


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Timestamp:
07/01/13 19:52:57 (6 years ago)
Author:
buchkremer
Comment:

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  • VLQ_tsingletvl

    v8 v9  
    2020   
    2121    == Description & Model Implementation ==
    22 This model is an simplified version of the VLQ FeynRules model, including a single vector-like T singlet quark (Q=2/3), 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 W, 25% to Z and H bosons in the asymptotic limit where the mass M goes to infinity, in agreement with what is expected from the Goldstone equivalence theorem. The corresponding FeynRules implementation is based on the VLQ.fr description, which provides a direct connection between experimental observables and the new quark couplings. The model file [attachment:tsingletvl.fr.zip] adds the following interactions to the SM Lagrangian:[[Image(TSinglet.png)]]
     22This model is an simplified version of the VLQ FeynRules model, including a single vector-like T singlet quark (Q=2/3), 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 W, 25% to Z and H bosons in the asymptotic limit where the mass M goes to infinity, in agreement with what is expected from the Goldstone equivalence theorem. The corresponding FeynRules implementation is based on the VLQ.fr description, which provides a direct connection between experimental observables and the new quark couplings. The model file [attachment:tsingletvl.fr.zip] adds the following interactions to the SM Lagrangian:[[Image(TSinglet.2.png)]]
    2323
    2424The associated electromagnetic and strong interactions are also included, together with the T singlet kinetic and mass terms. The user-defined parameters, summarised in [attachment:Parameters.pdf], consist of: