Integrating out resonances in strongly-coupled electroweak scenarios
1 Departamento de Matemáticas, Física y Ciencias Tecnológicas, Universidad CEU Cardenal Herrera, 46115 Alfara del Patriarca, València Spain
2 Departament de Física Teòrica, IFIC, Universitat de València – CSIC, 46071 València, Spain
3 Departamento de Física Teórica I, Universidad Complutense de Madrid, 28040 Madrid, Spain
b e-mail: firstname.lastname@example.org
Published online: 22 March 2017
Accepting that there is a mass gap above the electroweak scale, the Electroweak Effective Theory (EWET) is an appropriate tool to describe this situation. Since the EWET couplings contain information on the unknown high-energy dynamics, we consider a generic strongly-coupled scenario of electroweak symmetry breaking, where the known particle fields are coupled to heavier states. Then, and by integrating out these heavy fields, we study the tracks of the lightest resonances into the couplings. The determination of the low-energy couplings (LECs) in terms of resonance parameters can be made more precise by considering a proper short-distance behaviour on the Lagrangian with heavy states, since the number of resonance couplings is then reduced. Notice that we adopt a generic non-linear realization of the electroweak symmetry breaking with a singlet Higgs.
© The Authors, published by EDP Sciences, 2017
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