The highlights and conflicts at the B Factories are briefly reviewed. CP violation was established in 2001 in B → J/ψKS and related modes, which has now become a precision measurement of CP violation in B-B 0 mixing. However, the situation for the B → ππ and charmless b → s modes, which probe also CP violation in the decay amplitude, are not quite settled yet. They could be hinting at presence ...

Since the 1964 discovery of KL → π+π− [1], understanding CP violation has been a major goal of particle physics. Subsequent experiments showed that the dominant mechanism of CP violation in neutral kaons (still the only particle system in which CP violation has been observed) is a small asymmetry between K0 → K and K → K0 mixing. This asymmetry, referred to as indirect CP violation, results in ...

We propose a new mechanism called " real CP violation " to originate spontaneous CP violation. Starting with a CP conserving theory with scalar fields in the adjoint representation of a global or local non-abelian symmetry, we show that even though the VEV's of such scalars are real they give rise to a spontaneous violation of CP. We provide an illustrative example of how this new mechanism of ...

The origin of CP violation is one of the fundamental questions of particle physics. Currently, we know of only two distinct examples of CP violation: the matter-antimatter asymmetry in the universe and CP violation in the neutral kaon system. Although there are several manifestations of CP violation in the neutral kaon system, all of them (with the possible exception of the measurements of = wh...

CP violation plays a privileged role in our quest for new physics beyond the electroweak standard model (SM). In the SM the violation of CP in the weak interactions has a single source: the phase of the quark mixing matrix (the CKM matrix, for Cabibbo–Kobayashi– Maskawa). Most extensions of the SM exhibit new sources of CP violation. For instance, the truly minimal supersymmetric extension of t...

We consider the possibilities of testing CP conservation in the process e + e − → ZH. The easiest is to measure the forward-backward asymmetry of the Z boson, a nonzero value of which signals CP violation. The effects of CP violation are predicted in the two Higgs doublet model. We show here that a choise of optimal observables can improve the possibility of observing CP violation. Although the...

CP violation in K and B decays is reviewed in the Standard Model (SM) and beyond the SM. In K decays, one is seeking first evidence for CP violation in direct K -+ ~rTr decays. This would not give a precise quantitative test for the present explanation of CP violation in terms of a phase in the Cabibbo-Kobayashi-Maskawa (CKM) matrix. Such tests are provided by a variety of CP asymmetries in neu...

CP violation in K and B decays is reviewed in the Standard Model (SM) and beyond the SM. In K decays, one is seeking first evidence for CP violation in direct K → ππ decays. This would not give a precise quantitative test for the present explanation of CP violation in terms of a phase in the Cabibbo-Kobayashi-Maskawa (CKM) matrix. Such tests are provided by a variety of CP asymmetries in neutra...

CP violation is now measured by three numbers: ǫ and ǫ for the K system and sin2β for B. A future measurement of the analogue of ǫ for the B system would end any possibility of a Superweaklike Theory. Future frontiers in CP violation are briefly discussed. 1 ǫ and ǫ for the K System C, P, and T have played a major role in particle physics over the last fifty years. I like to say that these were...