2026-06-27T12:26:21Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/72612023-08-27T16:32:23Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Pich, Antonio
author
Rosell, Ignasi
author
Sanz Cillero, Juan José
2023-06-17T08:29:10Z
2023-06-17T08:29:10Z
2020-08-10
2470-0010
10.1103/PhysRevD.102.035012
https://hdl.handle.net/20.500.14352/7261
https://doi.org/10.1103/PhysRevD.102.035012
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.035012
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 JP=0± and JP=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.
eng
Atribución 3.0 España
Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
journal article
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496897
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PhysRevD.102.035012.pdf