Flavor Symmetric Sectors and Collider Physics

TL;DR

This paper explores new scalar and vector particles respecting flavor symmetries that could be detected at the LHC, offering a framework to address collider anomalies while satisfying flavor constraints.

Contribution

It catalogs flavor symmetric representations and applies them to collider anomalies like the t-tbar asymmetry and B_s mixing, providing a comprehensive phenomenological analysis.

Findings

Potential for early LHC discovery of flavor symmetric states.

Model-independent acceptance corrections for t-tbar asymmetry analysis.

Constraints on flavor symmetric models from collider data.

Abstract

We discuss the phenomenology of effective field theories with new scalar or vector representations of the Standard Model quark flavor symmetry group, allowing for large flavor breaking involving the third generation. Such field content can have a relatively low mass scale \lesssim TeV and O(1) couplings to quarks, while being naturally consistent with both flavor violating and flavor diagonal constraints. These theories therefore have the potential for early discovery at LHC, and provide a flavor safe "tool box" for addressing anomalies at colliders and low energy experiments. We catalogue the possible flavor symmetric representations, and consider applications to the anomalous Tevatron t-tbar forward backward asymmetry and B_s mixing measurements, individually or concurrently. Collider signatures and constraints on flavor symmetric models are also studied more generally. In our examination of the t-tbar forward backward asymmetry we determine model independent acceptance corrections appropriate for comparing against CDF data that can be applied to any model seeking to explain the t-tbar forward backward asymmetry.