Baryon and Baryonium States with String-Junctions in the Dual Unitarization Scheme

概要

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We consider a baryon and a family of baryonium states in the dual unitarization scheme taking account of topological structures; a baryon has a Y shaped structure with a string-junction at the center and baryonium states denoted by M^^^_4, M^^^_2 and M^^^_0 have a pair of junction and antijunction. Coupled channel bootstrap equations are given for the baryonic and mesonic reggeons and for the pomeron. The breaking of the exchange degeneracy between the δ and β trajectories of baryons is given through a non-planar diagram with a twisted meson bridge between two membranes swept by strings; we have α_<Δ_δ>-α_<N_β>)〜0.1. The intercepts of the family of baryonium states are that α_<M_4>(±)<α_<M_2>(±)<α_<M_0>(-), where (±) denote charge conjugation parity, and the triple-reggeon couplings M^^^_nMM are shown to be g^2(M^^^_4^<(±)>MM)<g^2(M^^^_2^<(±)>MM) <g^2(M^^^_0^<(+)>MM)<g^2(M^^^_0^<(-)>MM), where M denotes an ordinary natural parity meson: the ratio g(M^^^_0^<(-)>MM): g(M^^^_0^<(-)>BB^^-)≈1:2 is encouraging to the idea that the difficulty of the ω extinction can be remedied by the existence of the M^^^_0^<(-)>.
理論物理学刊行会の論文
1977-11-25