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    Complex-Regge-Pole Model in πN Scattering

    Robert T. Park*

    N. Barik†

    David T. Gregorich

    • California State University, Northridge, California 91324
    • University of California, Riverside, California 92502

    • University of California, Riverside, California 92502

    • California State University, Los Angeles, California 90032

    • *Present address: Department of Physics and Astronomy, California State University, Northridge, California 91324.
    • †Address after September 1, 1972: Department of Physics, Utkal University, Bhubaneswar-4, Orissa, India.
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    Phys. Rev. D 6, 3162 – Published 1 December, 1972

    DOI: https://doi.org/10.1103/PhysRevD.6.3162

    Abstract

    The complex-Regge-pole model is applied to πN elastic and charge-exchange scattering in the forward direction. P, P′, and ρ poles are assumed to dominate with both square-root and logarithmic singularity at the branch point. The Pomeranchuk trajectory is parametrized both as a real pole and as a pair of complex-conjugate poles. Various ghost-eliminating mechanisms are tested, and good fits are obtained including excellent agreement with the new πN charge-exchange and elastic polarization data. P′ and ρ are nearly exchange degenerate, but the data show no strong preference for either a real or complex Pomeranchuk trajectory or for a square-root or logarithmic branch cut.

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    Phys. Rev. D 6, 3162– Published 1 December, 1972
    • Received 31 July 1972

    © 1972 American Physical Society

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