1/Nc Corrections in Meson-Baryon scattering | Zendy

Herry J. Kwee | Zendy; Richard F. Lebed | Zendy

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1/Nc Corrections in Meson-Baryon scattering

Author(s) -

Herry J. Kwee,

Richard F. Lebed

Publication year - 2007

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2007/10/046

Subject(s) - physics , hypercharge , scattering , particle physics , isospin , meson , baryon , scattering amplitude , quantum chromodynamics , multiplet , amplitude , spin (aerodynamics) , quantum electrodynamics , nuclear physics , quantum mechanics , fermion , spectral line , thermodynamics

Corrections to meson/ground-state baryon scattering amplitudes in the 1/N_cexpansion of QCD have previously been shown to be controlled by the t-channeldifference |I_t - J_t| of isospin and angular momentum and by the change ofhypercharge Y_t. Here we derive the corresponding expressions in the originalscattering s channel, allowing for nonzero meson spin and nontrivial SU(3)flavor quantum numbers, and provide explicit examples of the crossing relevantfor pi N --> rho N and K N scattering.Comment: Addition of a physical example, minor changes to clarify certain issues and add one reference. 18 pages, no figure

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