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Título:
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Top-antitop production from W_(L)^(+)W_(L)^(-) and Z_(L)_Z(L) scattering under a strongly interacting symmetry-breaking sector
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Autores:
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Castillo, Andrés ;
Delgado López, Rafael ;
Dobado González, Antonio ;
Llanes Estrada, Felipe José
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Tipo de documento:
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texto impreso
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Editorial:
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Springer, 2017-07-01
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física-Modelos matemáticos
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Tipo = Artículo
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Resumen:
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By considering a non-linear electroweak chiral Lagrangian, including the Higgs, coupled to heavy quarks, and the equivalence theorem, we compute the one-loop scattering amplitudes W^(+)W^(?) ? t?, Z Z ? t? and hh ? t? (in the regime M^(2)_(t)/v^(2) « ?sM_(t)/v^(2) « s/v^(2) and to NLO in the effective theory). We calculate the scalar partial-wave helicity amplitudes which allow us to check unitarity at the perturbative level in both M_(t) /v and s/v. As with growing energy perturbative unitarity deteriorates, we also introduce a new unitarization method with the right analytical behavior on the complex s-plane and that can support poles on the second Riemann sheet to describe resonances in terms of the Lagrangian couplings. Thus we have achieved a consistent phenomenological description of any resonant t? production that may be enhanced by a possible strongly interacting electroweak symmetry breaking sector.
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En línea:
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https://eprints.ucm.es/44385/1/delgadolopez02libree%2BCC.pdf
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