Search for the K(L) --> PI0 PI0 E+ E- Decay in the KTeV Experiment

Abstract

The recent discovery of a large CP violating asymmetry in K(L) --> PI+ PI- E+ E- mode has prompted us to seach for the associated K(L) --> PI0 PI0 E+ E- decay mode in the KTeV-E799 experiment at Fermilab. In 2.7E+11 K(L) decays, one candidate event has been observed with an expected background of 0.3 event, resulting in an upper limit for the K(L) --> PI0 PI0 E+ E- branching ratio of 6.6E-09 at the 90% confidence level.

To be published in Phys. Rev. Lett

References in corpus (4)

• Observation of CP Violation in K(L)->pi+pi-e+e- Decays
• K_L to π^+ π^- e^+ e^-
• Measurement of the branching ratio of pi^0 -> e^+e^- using K_L -> 3 pi^0 decays in flight
• Observation of the decay mode K_L -> pi^+ pi^- e^+ e^-

Cited by in corpus (14)

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• Reasonable fermionic quantum information theories require relativity
• Study of the branching ratio and charge asymmetry for the decay Ks->pi e nu with the KLOE detector
• Strong and radiative decays of excited vector mesons and predictions for a new $\varphi (1930)$ resonance
• Present and Future CP Measurements
• Probing photon helicity in radiative B decays via charmonium resonance interference
• Search for the Rare Decay K_{L}\toπ^{0}π^{0}γ
• Study of conventional and non-conventional scalar and vector mesons
• New Physics Searches at Kaon and Hyperon Factories
• On the electron-positron energy asymmetry in K_L --> pi0 e+ e-
• The Search for $K_L\to {\pi }^0{\pi }^0\gamma \gamma$ and $K_L\to {\pi }^0{\pi }^{0}X$ where $X\to 2\gamma$ at the KOTO Experiment
• Interference of Conversion and Bremsstrahlung Amplitudes in the Decay K_L -> mu^+ mu^- gamma