Searching for New Physics through correlations of Flavour Observables

TL;DR

This paper explores how correlations among flavour observables can reveal new physics beyond the Standard Model, focusing on models with additional gauge symmetries, scalars, and vectorlike fermions, and how these correlations can distinguish different scenarios.

Contribution

It introduces and analyzes various new physics models, highlighting unique correlations among flavour observables that can be used to test and differentiate these models from existing frameworks.

Findings

Correlations between flavour observables can test Z' models.

Distinct patterns emerge in models with heavy scalars and vectorlike fermions.

Certain correlations differ from those in constrained minimal flavour violating models.

Abstract

The coming flavour precision era will allow to uncover various patterns of flavour violation in different New Physics scenarios. We discuss different classes of them. A simple extension of the Standard Model that generally introduces new sources of flavour and CP violation as well as right-handed currents is the addition of a U(1) gauge symmetry to the SM gauge group. In such Z' models correlations between various flavour observables emerge that could test and distinguish different Z' scenarios. A concrete model with flavour violating Z' couplings is the 331 model based on the gauge group SU(3)_C x SU(3)_L x U(1)_X. We also study tree-level FCNCs mediated by heavy neutral scalars and/or pseudo-scalars H^0(A^0). Furthermore the implications of an additional approximate global U(2)^3 flavour symmetry is shortly discussed. Finally a model with vectorlike fermions and flavour violating Z couplings is presented. We identify a number of correlations between various observables that differ from those known from constrained minimal flavour violating (CMFV) models and that could test and distinguish these different scenarios.