The problem of CP conservation and CP violation for two heavy neutri-nos production in e + e − interaction is considered. Very convenient way of parametrization of the neutrino mass matrix, from which necessary and sufficient condition for CP conservation easily follows, is presented. Contrary to the Kobayashi-Maskawa mechanism, the effects of CP violation in the lepton sector with Majorana neu...

The explicit CP violation in the MSSM radiatively induces a finite unremovable alignment between the Higgs doublets. This additinal phase can be as large as the original CP phases in certain portions of the MSSM parameter space. Considering the specific case of the charginos, this additional phase is shown to induce a conceivable amount of CP violation near the would–be CP conserving points. Mo...

If the Standard Model explanation of CP violation is correct, then measurements of CP-violating asymmetries in B meson decays can in principle determine the entire quark mixing matrix. According to the Standard Model (SM), CP violation arises from the fact that in the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix, some of the elements are not real. This picture of CP violation will be inc...

CP invariance condition and rephasing invariance in KM scheme of CP violation is discussed. The CP violation measure in B physics, corresponding to the three angles of unitarity triangle are given in rephasing invariant form. With the obtained results it is shown that the sum of the three CP angles to be measured at B factories becomes π even if the Kobayashi-Maskwa matrix is not a 3 × 3 unitar...

We propose a model of soft CP violation that evades the strong CP problem and can describe observed CP violation in the neutral kaon sector, both direct and indirect. Our model requires two “duark” mesons carrying quark number two that have complex (CP-violating) bare masses and are coupled to quark pairs. Aside from the existence of these potentially observable new particles with masses of sev...

We propose a model of soft CP violation that evades the strong CP problem and can describe observed CP violation in the neutral kaon sector, both direct and indirect. Our model requires two “duark” mesons carrying quark number two that have complex (CP-violating) bare masses and are coupled to quark pairs. Aside from the existence of these potentially observable new particles with masses of sev...

Considering that the existing experimental limit for CPT violation is still poor, we explore various possible ways to test CPT symmetry in CP -violating B decays at e+e− B factories. We find that it is difficult to distinguish between the effect of direct CP violation and that of CPT violation in the time-integrated measurements of neutral B decays to CP eigenstates such as ψKS and π +π−. Inste...

Considering that the existing experimental limit for CPT violation is still poor, we explore various possible ways to test CPT symmetry in CP -violating B decays at e+e− B factories and hadron machines. We find that it is difficult to distinguish between the effect of direct CP violation and that of CPT violation in the time-integrated measurements of neutral B decays to CP eigenstates such as ...

The possibility of a non-zero value for neutron EDM continues to be of central importance in physics and cosmology. A non-zero neutron EDM would be a direct evidence for time-reversal symmetry violation. It also implies CP-violation under the assumption of CPT invariance. To date, only two examples of CP-violation have been found: decays of neutral K mesons and B mesons. CP-violation is believe...

We report results of a search for CP violation in the singly Cabibbo-suppressed decays D → KKπ, φπ, K(892)0K+, and πππ based on data from the charm hadroproduction experiment E791 at Fermilab. We search for a difference in the D and D decay rates for each of the final states. No evidence for a difference is seen. The decay rate asymmetry parameters (ACP ), defined as the difference in the D and...