String-Junction Model and Width of Baryonium

概要

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The String-junction model incorporates a selection rule (covalence rule) as a natural extension of the OZI and FWR rules. This rule forbids meson cascade decay among the different kinds of baryonium, <M_4>^2, <M_2>^2 and <S_0>^2, where the lower (upper) index denotes the total number of quarks (junctions). Consequences of the covalence rule for variation in width of baryonium candidates in the mass range 1.4~2.2GeV are examined. A possibility is pointed out that above 2GeV candidates with narrow width contain one or more strange quark pairs with small production cross sections (like baryonium), while baryounium state without strange quark pairs above 2GeV have width broad enough and are expected to account for B<B^^-> duality. A brief comparison is made between the string-junction model with models in the bag picture.
理論物理学刊行会の論文
1979-01-25