Experimental consequences of a small mixture of cc̄ in the η′ and η mesons
1976; Elsevier BV; Volume: 60; Issue: 2 Linguagem: Inglês
10.1016/0370-2693(76)90416-0
ISSN1873-2445
Autores Tópico(s)High-Energy Particle Collisions Research
ResumoWe show that a small but significant mixing of η and η′ with the pseudoscalar cc̄ state may explanin the large η and η′ masses, the small mass of the new 2.8 GeV state, the large rates for ψ′ → ψη, ψ → η′γ and ψ → ηψ, the large number of photons in ψ decay, some of the missing decay modes of ψ′ and ψ and the small K/π ratio in ψ′ and ψ decays. We predict that 20–30% of all ψ and ψ′ decays contain an η′. Other tests and one important difficulty are also discussed.
Referência(s)