%0 Journal Article
%T Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
%A Pich, A.
%A Rosell, I.
%A Sanz-Cillero, J. J.
%J Physical Review D
%D 2020
%V 102
%N 3
%I Amer Physical Soc
%@ 1550-7998
%G English
%F Pich_etal2020
%O WOS:000557730600006
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4497), last updated on Tue, 25 Aug 2020 07:43:42 +0000
%X The LHC has confirmed the existence of a mass gap between the known particles and possible new states. Effective field theory is then the appropriate tool to search for low-energy signals of physics beyond the Standard Model. We adopt the general formalism of the electroweak effective theory, with a nonlinear realization of the electroweak symmetry breaking, where the Higgs is a singlet with independent couplings. At higher energies we consider a generic resonance Lagrangian which follows the above-mentioned nonlinear realization and couples the light particles to bosonic heavy resonances with J(P) = 0(+/-) and J(P) = 1(+/-). Integrating out the resonances and assuming a proper short-distance behavior, it is possible to determine or to constrain most of the bosonic low-energy constants in terms of resonance masses. Therefore, the current experimental bounds on these bosonic low-energy constants allow us to constrain the resonance masses above the TeV scale, by following a typical bottom-up approach, i.e., the fit of the low-energy constants to precise experimental data enables us to learn about the high-energy scales, the underlying theory behind the Standard Model.
%R 10.1103/PhysRevD.102.035012
%U https://arxiv.org/abs/2004.02827
%U https://doi.org/10.1103/PhysRevD.102.035012
%P 035012-12pp