On the rare $K \to \pi \bar l l$ decays

David Greynat

On the rare $K \to \pi \bar l l$ decays

High Energy Physics - Phenomenology 2007-05-23 v1

Authors: David Greynat

Abstract

In this talk, we present our recent work on the $K\ra\pi \bar{l} l$ decays in a combined framework of chiral perturbation theory and Large-- $N_c$ QCD under the dominance of a minimal narrow resonance structure. The proposed description reproduces very well the experimental Br $(K^+\ra\pi^+ e^+ e^-)$ and Br $(K_S\ra\pi^0 e^+ e^-)$ . Predictions for the $K\ra\pi \mu^{+}\mu^{-}$ modes are also obtained and we can conclude to the constructive type for the interference between the {\it direct} and {\it indirect} CP--violation amplitudes in $K_L\ra\pi^0 e^+ e^-$ .

Keywords

rare kaon decays chiral perturbation theory large-Nc QCD CP violation K to pi l l

Cite

@article{arxiv.hep-ph/0411210,
  title  = {On the rare $K \to \pi \bar l l$ decays},
  author = {David Greynat},
  journal= {arXiv preprint arXiv:hep-ph/0411210},
  year   = {2007}
}

Comments

Talk given at the $11^{th}$ High-Energy Physics International Conference on Quantum Chromodynamics, 5-10 July (2004), Montpellier (France)

On the rare $K \to \pi \bar l l$ decays

Abstract

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