Data on the production of vector mesons ρ and ω in the backward direction via nucleon exchange areinvestigated. A better understanding of these data is achieved than hitherto, albeit at a semi-quantitative level. Th...Data on the production of vector mesons ρ and ω in the backward direction via nucleon exchange areinvestigated. A better understanding of these data is achieved than hitherto, albeit at a semi-quantitative level. Thisis achieved partly by using more up-to-date values for the vector couplings and partly by using more precise theoreticalformalism. In view of this we conclude that the data do provide a useful constraint on the couplings.展开更多
Some analyses of the electromagnetic form factors of the nucleon and some analyses of the nucleon-nucleon potential favor a large coupling of the φ meson to nucleons. This is frequently quoted by advocates of a large...Some analyses of the electromagnetic form factors of the nucleon and some analyses of the nucleon-nucleon potential favor a large coupling of the φ meson to nucleons. This is frequently quoted by advocates of a large ss component of the nucleon. It is shown that such large OZI-violating couplings are incompatible with data on φproduction in backward direction via nucleon exchange.展开更多
文摘Data on the production of vector mesons ρ and ω in the backward direction via nucleon exchange areinvestigated. A better understanding of these data is achieved than hitherto, albeit at a semi-quantitative level. Thisis achieved partly by using more up-to-date values for the vector couplings and partly by using more precise theoreticalformalism. In view of this we conclude that the data do provide a useful constraint on the couplings.
文摘Some analyses of the electromagnetic form factors of the nucleon and some analyses of the nucleon-nucleon potential favor a large coupling of the φ meson to nucleons. This is frequently quoted by advocates of a large ss component of the nucleon. It is shown that such large OZI-violating couplings are incompatible with data on φproduction in backward direction via nucleon exchange.
