The LFU ratio [Formula: see text] in the Standard Model and beyond

We discuss the possibility of performing precise tests of [Formula: see text] universality in [Formula: see text] decays. We show that in wide regions of the dilepton invariant mass spectrum the ratio between muonic and electronic decay widths can be predicted with high accuracy, both within and bey...

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Detalles Bibliográficos
Autores principales: Bordone, Marzia, Cornella, Claudia, Isidori, Gino, König, Matthias
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2021
Materias:
Regular Article - Theoretical Physics
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8550350/
https://www.ncbi.nlm.nih.gov/pubmed/34720727
http://dx.doi.org/10.1140/epjc/s10052-021-09618-3
Descripción
Sumario:We discuss the possibility of performing precise tests of [Formula: see text] universality in [Formula: see text] decays. We show that in wide regions of the dilepton invariant mass spectrum the ratio between muonic and electronic decay widths can be predicted with high accuracy, both within and beyond the Standard Model. We present numerical expressions which can be used to extract precise information on short-distance dynamics if a deviation from universality is observed in the data.

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