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Improved constraints on Z′ bosons from electroweak precision data

Erler, Jens Y Langacker, Paul Y Munir, Shoaib Y Rojas, Eduardo (2009) Improved constraints on Z′ bosons from electroweak precision data. Journal of High Energy Physics, 2009 (08). 017-017. ISSN 1029-8479


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We calculate the masses and weak decay constants of flavorless and flavored ground and radially excited J^P=1^- mesons within a Poincaré covariant continuum framework based on the Bethe-Salpeter equation. We use in both the quark’s gap equation and the meson bound-state equation an infrared massive and finite interaction in the leading symmetry-preserving truncation. While our numerical results are in rather good agreement with experimental values where they are available, no single parametrization of the QCD inspired interaction reproduces simultaneously the ground and excited mass spectrum, which confirms earlier work on pseudoscalar mesons. This feature being a consequence of the lowest truncation, we pin down the range and strength of the interaction in both cases to identify common qualitative features that may help to tune future interaction models beyond the rainbow-ladder approximation.

Tipo de Elemento: Artículo
Asunto: Q Ciencias > QC Physics
Division: Facultad de Ciencias Exactas y Naturales > Programa de Física > Productividad
Depósito de Usuario: Prof. Eduardo Rojas
Fecha Deposito: 26 Sep 2018 13:48
Ultima Modificación: 26 Sep 2018 13:48

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