2000/09/30 by M. N. Achasov, М. Н. Ачасов, K. I. Beloborodov +48 · 101 citations
Chemistry · Physics and Astronomy · #Analytical Chemistry (journal) #Chemistry #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Vector meson dominance #hep-ex
paper · pdf · doi:10.1103/physrevd.63.072002
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 63(7) (American Physical Society) · 26 pages REVTEX and 15 figures, accepted for publication in Physical Review D
arxiv created 2001/02/26 · openalex publication_date 2001/03/06 · openalex created_date 2016/06/24 · arxiv updated 2019/08/17 · openalex updated_date 2026/08/05
The cross sections of the processes e+e^\ensuremath-\ensuremath→K+K^\ensuremath-, e+e^\ensuremath-\ensuremath→KSKL, and e+e^\ensuremath-\ensuremath→\ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathπ0 were measured in the SND experiment at the VEPP-2M collider in the energy region near the \ensuremathφ(1020) meson. These measurements were based on about 106 K+K^\ensuremath-, 0.5\ifmmode×\else\texttimes\fi106 KSKL, and 0.4\ifmmode×\else\texttimes\fi106 \ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathπ0 selected events. The measured cross sections have been analyzed in the framework of the vector meson dominance model and the main parameters of the \ensuremathφ resonance were obtained, such as its mass, width, the production cross section, and branching ratios of the main decay modes. The measured value of the \ensuremathφ meson total width, \ensuremathΓ_\ensuremathφ=4.21\ifmmode±\else\textpm\fi0.04, is lower than the present world average of 4.458\ifmmode±\else\textpm\fi0.032 MeV. Contributions in addition to the conventional vector meson dominance model were found in the e+e^\ensuremath-\ensuremath→\ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathπ0 reaction cross section.