New Results on Rare and Forbidden Semileptonic K⁺ Decays

2000/12/05 by Peter Truoel, P. Truoel, Truoel, Peter
Computer Science · Physics and Astronomy · #Cellular Automata and Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle physics theoretical and experimental studies #Quantum chaos and dynamical systems #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0012012

15 pages, 6 figures

arxiv created 2000/12/05 · openalex publication_date 2000/12/05 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Experiment E865 at the Brookhaven AGS was set up primarily to search for the lepton flavour violating decay K⁺→ π⁺μ⁺e^- (K_πμe) with high sensitivity. The flexibility of the apparatus allowed also to obtain more than an order of magnitude larger than previously available event samples on the following decay modes: π⁺e⁺e^- (K_πee), π⁺μ⁺μ^- (K_πμμ), π⁺π^-e⁺ν_e (K_e4), μ⁺e⁺e^-ν_μ, and e⁺e⁺e^-ν_e. The report focusses on the K_πμe results and those on other lepton flavour violating decays as well as the K_e4 data, from which a new, quite precise value for the s-wave ππ scattering length can be deduced.

Related

• First search for K⁺→π⁰πμe decays
• Searches for lepton flavour and lepton number violation in K⁺ decays at NA62
• Search for K⁺ decays into the π⁺e⁺e^-e⁺e^- final state
• New Rare Decay Results from KTeV
• Measurements from KTeV of Rare Decays of the K_L and pi⁰