$F^0-\bar{F}^0 $ Mixing and CP Violation in the General Two Higgs Doublet Model

TL;DR

This paper explores the implications of the general two Higgs doublet model on meson mixing and CP violation, highlighting potential deviations from the Standard Model and their impact on unitarity triangle measurements.

Contribution

It provides a phenomenological analysis of Yukawa coupling constraints and demonstrates the possibility of enhanced D0-D0bar mixing and new CP violation sources in the model.

Findings

Potential for larger D0-D0bar mixing than Standard Model predicts

New sources of CP violation could alter unitarity triangle measurements

Constraints on Yukawa couplings from meson mixing data

Abstract

A phenomenological analysis of the general two Higgs doublet model is presented. Possible constraints of the Yukawa couplings are obtained from the $K^0-\bar{K}^0, B^0-\bar{B}^0$ and $D^0-\bar{D}^0$ mixings. A much larger $D^0-\bar{D}^0$ mixing than the standard model prediction is possible. It is shown that the emerging of various new sources of CP violation in the model could strongly affect the determination of the unitarity triangle. It can be helpful to look for a signal of new physics by comparing the extracted angle $\beta$ from two different ways, such as from the process $B\to J/\psi K_{S}$ and from fitting the quantities $|V_{ub}|, \Delta m_{B}$ and $\epsilon$.