The Flavor of UV Physics

TL;DR

This paper investigates how new physics near the TeV scale influences low-energy observables through SMEFT, revealing insights into the flavor structure of UV theories by combining top and B-physics data.

Contribution

It provides a combined analysis of top-quark and B-physics observables within SMEFT, elucidating the flavor structure of Wilson coefficients and the importance of flavor symmetry breaking.

Findings

Combining top and B-physics data is essential to identify flavor symmetry breaking.

The analysis includes a full analytic expansion of SMEFT coefficients under Minimal Flavor Violation.

Detailed study of SMEFT effects in b→s flavor transitions.

Abstract

New physics not far above the TeV scale should leave a pattern of virtual effects in observables at lower energies. What do these effects tell us about the flavor structure of a UV theory? Within the framework of Standard Model Effective Field Theory (SMEFT), we resolve the flavor structure of the Wilson coefficients in a combined analysis of top-quark and $B$-physics observables. Our fit to LHC and $b$-factory measurements shows that combining top and bottom observables is crucial to pin down possible sources of flavor symmetry breaking from UV physics. Our analysis includes the full analytic expansion of SMEFT coefficients in Minimal Flavor Violation and a detailed study of SMEFT effects in $b\to s$ flavor transitions.