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arXiv · 2201.09887

Flavorful Electroweak Precision Observables in the Standard Model Effective Field Theory

Sally Dawson·Pier Paolo Giardino
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Abstract

Electroweak precision observables (EWPO) measured at the W and Z poles provide stringent limits on possible beyond the Standard Model physics scenarios. In an effective field theory (EFT) framework, the next-to-leading order QCD and electroweak results for EWPO yield indirect limits on possible 4-fermion operators that do not contribute to the observables at tree level. Here we calculate the next-to-leading corrections to EWPO induced by flavor non-universal 4-fermion interactions and find that the extracted limits on EFT coefficients have a strong dependence on the flavor structure of the 4-fermion operators.

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Sally Dawson, Pier Paolo Giardino. 2022-01-24. Flavorful Electroweak Precision Observables in the Standard Model Effective Field Theory. https://doi.org/10.1103/physrevd.105.073006

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