CP Violation In and Beyond the Standard Model

TL;DR

This paper reviews CP violation within the Standard Model and explores its implications for new physics frameworks, emphasizing experimental measurements in meson decays and analyzing potential signals beyond the Standard Model.

Contribution

It provides a comprehensive analysis of CP violation in the Standard Model and reviews four new physics frameworks, highlighting their unique CP-violating signatures and experimental implications.

Findings

Standard Model predicts specific CP asymmetries in B decays.

Supersymmetry enhances CP violation as a probe of new physics.

Extensions like scalar sectors and vector-like quarks offer distinctive CP signatures.

Abstract

The special features of CP violation in the Standard Model are presented. The significance of measuring CP violation in B, K and D decays is explained. The predictions of the Standard Model for CP asymmetries in B decays are analyzed in detail. Then, four frameworks of new physics are reviewed: (i) Supersymmetry provides an excellent demonstration of the power of CP violation as a probe of new physics. (ii) Left-right symmetric models are discussed as an example of an extension of the gauge sector. CP violation suggests that the scale of LRS breaking is low. (iii) The variety of extensions of the scalar sector are presented and their unique CP violating signatures are emphasized. (iv) Vector-like down quarks are presented as an example of an extension of the fermion sector. Their implications for CP asymmetries in B decays are highly interesting.