Determination of the relative decay rate KS → π e ν / KL → π e ν

NA48 Collaboration

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The decay rate of KS → π e ν relative to the rate of KL → π e ν has been measured by the NA48 Collaboration in a neutral kaon beam originating from 400 GeV proton-Be interactions at the CERN SPS. The result is 0.993 ± 0.026stat ± 0.022syst, compatible with 1 in agreement with the Standard Model prediction at tree level. It implies B R (KS → π e ν) = (7.05 ± 0.18stat ± 0.16syst) × 10-4.

Original languageEnglish (US)
Pages (from-to)145-150
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2-4
StatePublished - Sep 20 2007


  • Kaon decays
  • Semileptonic decays
  • Test of Standard Model

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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