Rare Kaon Decay Experiments at CERN

Abstract

The NA62 experiment at the CERN SPS aims to measure the branching ratio of the rare decay $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ with a relative precision of $\sim 10$. To achieve that goal, it is designed to be exposed to $1.2\times 10^{13}$ $K^{+}$ decays in its fiducial volume. The unprecedented $K^{+}$ flux will lead to record sensitivities to rare and forbidden decays of $K^{+}$ and ${\pi }^0$, including those that violate lepton flavour or lepton number conservation. The expected NA62 performances for lepton flavour conservation and lepton universality tests are discussed. Relevant on-going or recently completed measurements from the $K^{\pm }$ decay data sets collected by earlier kaon experiments at CERN (NA48/2 and NA62-$R_K$) are also presented.

Talk given at the 1st Charged Lepton Flavour Conference, Lecce, May 2013

References in corpus (5)

• Two-Loop Electroweak Corrections for the K -> pi nu anti-nu Decays
• The Standard Model prediction for R_{e/mu}^{(pi,K)}
• Tree-level lepton universality violation in the presence of sterile neutrinos: impact for $R_K$ and $R_{\pi }$
• New measurement of the K+- --> pi+-mu+mu- decay
• Gamma(K -> e nu)/Gamma(K -> mu nu) in the Minimal Supersymmetric Standard Model