Search for the Rare Decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-

Abstract

The KTeV E799 experiment has conducted a search for the rare decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-, where the X0 is a possible new neutral boson that was reported by the HyperCP experiment with a mass of (214.3 pm 0.5) MeV/c^{2}. We find no evidence for either decay. We obtain upper limits of Br(KL->pi0pi0X0->pi0pi0mu+mu-) < 1.0 x 10^{-10} and Br(KL->pi0pi0mu+mu-) < 9.2 x 10^{-11} at the 90% confidence level. This result rules out the pseudoscalar X0 as an explanation of the HyperCP result under the scenario that the \bar{d}sX0 coupling is completely real.

References in corpus (8)

• Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Upsilon -> gamma A0
• Measurement of the rare decay pi0 -> e+ e-
• Search for Lepton Flavor Violating Decays of the Neutral Kaon
• Search for NMSSM Higgs bosons in the h->aa->mumu mumu, mumu tautau channels using ppbar collisions at sqrt{s}=1.96 TeV
• Search for a low-mass Higgs boson in Y(3S)-->gamma A^0, A^0-->tau^+tau^- at BABAR
• Has HyperCP Observed a Light Higgs Boson?
• Rare B Decays with a HyperCP Particle of Spin One
• Search for the Rare Decay K_{L}\toπ^{0}π^{0}γ

Cited by in corpus (9)

• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• Experiments with K-Meson Decays
• Evidence for the rare decay ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$
• Flavor violating processes with sgoldstino pair production
• New Physics Searches at Kaon and Hyperon Factories
• The Forward Physics Facility at the High-Luminosity LHC
• Observation of the very rare ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ decay
• Testing the HyperCP anomaly at LHCb: evidence for the ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ decay
• 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