Changes between Version 1 and Version 2 of Models/HiggsEffective


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Timestamp:
03/17/12 13:31:35 (8 years ago)
Author:
fabio
Comment:

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  • Models/HiggsEffective

    v1 v2  
    11= Higgs Effective couplings to gluons (and photons) =
    22
    3 The Higgs effective field theory ({{{heft}}}) model is an 'extension'' of the Standard Model, where the Higgs boson couples directly to gluons (and photons). In the SM these couplings are present through a heavy (top) quark loop. For a not too heavy Higgs (m,,h,,<2 m,,t,,), it is a good approximation to take the mass of the heavy quark in the loop to infinity (For this approximation to hold, not only should the Higgs mass be smaller than twice the top mass, also all other kinematic variables, such as the transverse momentum of the Higgs boson, should be smaller than 2m,,t,,.) This results in effective couplings between gluons and Higgs bosons.
     3The Higgs effective field theory ({{{heft}}}) model is an 'extension' of the Standard Model, where the Higgs boson couples directly to gluons (and photons). In the SM these couplings are present through a heavy (top) quark loop. For a not too heavy Higgs (m,,h,,<2 m,,t,,), it is a good approximation to take the mass of the heavy quark in the loop to infinity (For this approximation to hold, not only should the Higgs mass be smaller than twice the top mass, also all other kinematic variables, such as the transverse momentum of the Higgs boson, should be smaller than 2m,,t,,.) This results in effective couplings between gluons and Higgs bosons.
    44
    55The effective vertices can be derived from the effective dimension five Lagrangian: