The Flavourful Present and Future of 2HDMs at the Collider Energy Frontier

TL;DR

This paper explores how flavour physics and collider searches together can constrain Two-Higgs-Doublet Models, highlighting future sensitivities, the importance of flavour anomalies, and implications for electroweak phase transitions.

Contribution

It provides a combined analysis of flavour and collider data for 2HDMs, projecting future sensitivities and emphasizing the role of flavour anomalies in guiding new physics searches.

Findings

LHC data can significantly extend 2HDM parameter space exploration.

Flavour physics remains crucial in constraining models where collider sensitivity diminishes.

Flavour anomalies could indicate directions for future new physics investigations.

Abstract

We study the intersection of flavour and collider physics for Two-Higgs-Doublet models of Type I and II. Drawing from the flavour precision-LHC exotics search complementarity, we also provide a projection of the future sensitivity that can be achieved in light of currently available analyses. On the one hand, we find that the parameter space of the 2HDM can be explored significantly further with more data from the LHC with some complementarity with flavour physics. On the other hand, flavour physics results alongside their projections remain powerful tools to constrain the model space in regions where direct sensitivity to new states via exotics searches is lost. Our results further highlight the recently observed flavour physics anomalies as important drivers of new physics searches in the future; we also touch on implications for a strong first order electroweak phase transition.