# Flavour anomalies and (fundamental) partial compositeness

## TL;DR

This paper explores how partial compositeness in composite Higgs models can explain B-meson decay anomalies and lepton flavour universality violation, offering a unified solution to flavor physics deviations and the naturalness problem.

## Contribution

It introduces a simple partial compositeness model explaining B-decay anomalies and discusses the minimal fundamental partial compositeness (MFPC) model's flavor phenomenology.

## Key findings

- The simple model explains observed B-decay anomalies.
- MFPC model addresses flavor anomalies and naturalness.
- Updated results incorporate recent measurements.

## Abstract

Several measurements of B-meson decay observables show deviations from Standard Model (SM) predictions, some of them hinting at violation of lepton flavour universality (LFU). I discusses how the anomalies in rare B decays can be explained by partial compositeness. Partial compositeness is a key ingredient of models with a composite Higgs boson and generically leads to violation of LFU. After presenting a simple model with partial compositeness that is able to explain the anomalies in rare B decays, the flavour phenomenology of a minimal UV completion of a composite Higgs model with partial compositeness is discussed: the minimal fundamental partial compositeness (MFPC) model. A virtue of the MFPC model is its capability of serving both as a solution to the naturalness problem of the SM and as an explanation of the flavour anomalies in rare B-meson decays. In view of recent new measurements, the results on which this proceedings contribution is based are updated.