Evidence for the2πDecay of theK20Meson

Testing CPT invariance by using C-even neutral-meson-antimeson correlated states

“…We may recall that CP violation was first observed in the K 0 -K 0 system [2], and is now being actively searched for in the B 0 d -B 0 d system [3]; there are also observations of T violation [4] and tests of CPT invariance [5] in the K 0 -K 0 system, although their interpretation remains controversial [6].…”

“…(10)-antisymmetric under t 1 ↔ t 2 . Then, the decay rate can be written as the sum of a symmetric component R S (f, t 1 ; g, t 2 ) and an antisymmetric component R A (f, t 1 ; g, t 2 ),…”

Note on the thermal behaviour of the neutron electric dipole moment from QCD sum rules

“…The first experimental evidence of CP violation was discovered in the K −K mixing and kaon decays [1]. According to the CPT theorem, CP violation implies T violation.…”

“…In this regard, several scenarios were suggested. The most known one was proposed by Peccei and Quinn [10] and consists in implementing an extra U A (1) symmetry which permits a dynamical suppression of the undesired θ-term. This is possible due to the fact that the axial current J µ 5 is related to the gluonic field strength through the following relation ∂ µ J µ 5 = αs 8π G µνG µν .…”

Fermion polarization in sfermion decays as a probe of CP phases in the MSSM

“…CP violation, initially observed [1] only in the K 0 -K 0 system, is one feature of the Standard Model (SM) that still defies clear theoretical understanding. The CKM picture, which describes all the observed CP violation in terms of a single phase in the quark-mixing matrix, has been vindicated by the recent measurements of B 0 -B 0 mixing at BELLE and BABAR [2].…”