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Three-loop contributions to the $\rho$ parameter and iterated integrals of modular forms

We compute fully analytic results for the three-loop diagrams involving two different massive quark flavours contributing to the ρ parameter in the Standard Model. We find that the results involve exactly the same class of functions that appears in the well-known sunrise and banana graphs, namely el...

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Detalles Bibliográficos
Autores principales: Abreu, Samuel, Becchetti, Matteo, Duhr, Claude, Marzucca, Robin
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP02(2020)050
http://cds.cern.ch/record/2705804