The Decay Modes and Lifetime of Negative K-Mesons.

摘要: Two emulsion stacks, exposed to magnetically analysed enriched K−-meson beam of average momentum 430 MeV/c and 440 from Bevatron, have been used estimate the relative abundance lifetime K−-mesons. While following 103 m track length, 48 decay-like events were observed. From analysis with good geometry decay modes established: Kμ2Kπ2Kμ3Kπ3(τ′) Kβ. No example τ−-decay was found in line scan sample, but mode has established an area event. knowledge K+-decay modes, or mass primary particle assumed analysis. The mean mass, obtained kinematics Kμ2 Kπ2 mode, is (965.8−21.5+16.5) me. value fromτ−-decay be (964.45±2.91) percentages various are as follows: (56.9±12.8), (33.4±8.7), Kμ3 (5.9±3.1), Kπ3(τ′) (2.7±2.8), Kβ3 (2.9±1.9) τ−(0+2.0). determined after detailed considerations contamination due decaylike clean interactions, losses missing secondaries. (1.27−0.23+0.36)·10−8 s.