Erratum: Direct and indirectCPviolation in the decayKL→π+π−

Violation of Time Reversal Invariance in the DecaysKL→π+π−Sehgal1, Leusen2 1999Phys. Rev. Lett.Self Cite251490View full textAdd to dashboardCite

“…p 1 p 2 e 1 e 2 [1], in agreement with a theoretical prediction made some years ago [2,3]. In this Letter, we trace the origin of this effect to a large violation of CP invariance and T invariance in the decay K L !…”

RESULTS ON CP VIOLATION FROM THE NA48 EXPERIMENT AT CERN

“…The measured asymmetry is in agreement with theoretical predictions and previous results 19 . Moreover NA48 detected the first signal of K s → π + π − e + e − decays 20 .…”

K +→π + π 0 e + e −: a novel short-distance probe

“…This can be done by considering P violation not in the hadronic tensor but in the dilepton pair. This way one ensures that there is no contamination from the long-distance QED background [24]. We have already noted in Section 5 that axial leptonic vertices, which are generated by W -box and Z-penguin diagrams, induce P-violating effects through interference with vector leptonic currents.…”

“…Similarly to K L → π + π − e + e − [23,24,25,26], short-distance effects can be obtained in K + → π + π 0 e + e − by looking into P-violation in the lepton pair. As a result, and opposed to K ± → π ± π 0 γ, charge asymmetries are not needed for that purpose.…”