Further results from the interference of K S and K L in the π +π - decay modes
Abstract
Previous measurements on K ° decay and the interference of K L and K S in the π +π - decay modes have been extended. We find that the interference term has the predicted coefficient with an experimental uncertainty of about 15%, that the K L - K S mass difference is ± (0.445 ± 0.034), the phase ϕ = ϕη - ϕf is ± (1.41 ± 0.18) and we find no evidence for the lepton pair decays of K L. With 90% confidence Γ L.μ +μ -/Γ L < 2 × 10 -4 Γ L, e+e-/Γ L < 1.6 × 10 -4.
- Publication:
-
Physics Letters
- Pub Date:
- June 1966
- DOI:
- 10.1016/0031-9163(66)91312-6
- Bibcode:
- 1966PhL....21..595A