New near-threshold mesons

Production of η Mesons Near Threshold

It is argued that the strong energy dependence of the p d → 3Heη cross section near threshold is due to a final state interaction between the η meson and the 3He nucleus. The large scattering length that this implies is in accord with optical potential predictions and is evidence for a nearby virtual ‘‘bound’’ state in the η3He system. This model suggests that sharp structures should also be se...

Near-threshold Production of Η-mesons

It is shown that the striking energy variation in the p d → 3He η cross section near threshold is probably due to a final state interaction associated with a large (complex) η − 3He scattering length. The consequences of this hypothesis are studied for the production of the meson in the η − 4He and η − 7Be channels. PACS number(s): 25.40.Ve, 13.75.-n, 25.10.+s The cross sections for the product...

Near-threshold photoproduction of mesons from deuterium

The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters.

Near - threshold production of a 0 ( 980 ) mesons in the reaction pp → dK + K̄ 0

Production of φ Mesons in Near - Threshold πN and N N Reactions

We analyze the production of φ mesons in πN and N N reactions in the near-threshold region, using throughout the conventional " non-strange " dynamics based on such processes which are allowed by the non-ideal ω − φ mixing. We show that the occurrence of the direct φN N interaction may show up in different unpolarized and polarization observables in πN → N φ reactions. We find a strong non-triv...