1. DECAY CHARACTERISTICS AND MASSES OF POSITIVE K MESONS PRODUCED BY THE BEVATRON
- Author
-
James Ray Peterson, Robert W. Birge, Marian N. Whitehead, D. H. Stork, and Donald H. Perkins
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Meson ,Bevatron ,Astronomy and Astrophysics ,Atomic and Molecular Physics, and Optics - Abstract
A large emulsion stack exposed to the positive K beam at the Berkeley 6 GeV Bevatron has been used to measure the mass of the K-particles and their abundances. The masses for the decay modes Kμ2, Kπ2 and τ were obtained by measurement of the mean range of the secondaries. In addition, masses for all modes compared to the proton mass were measured by the range-momentum method. The abundances were determined by following and blob-counting secondaries. The data are : Type Abundances % Primary Mass (mfe) Mass from Secondary Range (mfe) τ 5.56 ± 0.41 966.3 ± 2.1 966.1 ± 0.7 τ´ 2.15 ± 0.47 967.7 ± 4 ─ Kfμ2 58.2 ± 3.0 967.2 ± 2.2 965.8 ± 2.4 Kfπ2 28.9 ± 2.7 966.7 ± 2.0 962.8 ± 1.8 Kfμ3 2.83 ± 0.95 969 ± 5 ─ Kfe3 3.23 ± 1.30 967 ± 8 ─
- Published
- 1956