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Título : Bottom-up approach within the electroweak effective theory : constraining heavy resonances
Autor : Pich Zardoya, Antonio.
Rosell Escribá, Ignasi.
Sanz Cillero, Juan José.
Materias: Particles (Nuclear physics)Colisiones (Física nuclear)Materia - Propiedades.Collisions (Nuclear physics)Partículas (Física nuclear)Matter - Properties.
Fecha de publicación : 10-ago-2020
Editorial : American Physical Society.
Citación : Pich, A., Rosell, I. and Sanz-Cillero, J.J. (2020). Bottom-up approach within the electroweak effective theory : constraining heavy resonances. Physical Review D, vol. 102, n. 3, art. 035012 (10 aug.). DOI: https://doi.org/10.1103/PhysRevD.102.035012
Resumen : 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 ¼ 0 and JP ¼ 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.
Descripción : Este artículo se encuentra disponible en la siguiente URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.035012
URI : http://hdl.handle.net/10637/12733
Derechos: http://creativecommons.org/licenses/by/4.0/deed.es
ISSN : 2470-0010.
2470-0029 (Electrónico).
Aparece en las colecciones: Dpto. Matemáticas, Física y Ciencias Tecnológicas

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