2-loop RG evolution of CP-violating 2HDM

TL;DR

This paper performs a detailed two-loop renormalization group analysis of CP-violating Two-Higgs-doublet models, incorporating experimental constraints and Barr-Zee contributions to understand how CP violation evolves across sectors.

Contribution

It introduces a comprehensive 2-loop RG analysis of CP violation in 2HDMs, including collider constraints and Barr-Zee effects, revealing how CP violation propagates during evolution.

Findings

CP violation spreads across sectors during RG evolution when Z2 symmetry is broken.

Additional constraints on CP-violating parameters are identified from collider and electric dipole moment data.

The analysis highlights the importance of higher-order effects in understanding CP violation in 2HDMs.

Abstract

We use the recently developed code 2HDME to perform a 2-loop renormalization group analyzis of the CP violating Two-Higgs-doublet model (2HDM). Using parameter scans of several scenarios of Z2 symmetry breaking, we investigate the properties of 2HDMs under renormalization group evolution. Collider data constraints are implemented with HiggsBounds and HiggsSignals and we include all the important Barr-Zee diagram contributions to the electron's electric dipole moment to put limits on the CP violation that is allowed both in the scalar and the Yukawa sector. As a result, we see that the CP violation spreads easily across the sectors during renormalization group evolution when one breaks the Z2 symmetry in either sector, putting additional constraints on the CP violating parameters.