Export citation

Export citation

Choose format for download:

Download Citation
  • Access by Xinjiang University

Ghost-pole subtraction and the σ-exchange NN potential

Earle L. Lomon

  • Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Phys. Rev. D 22, 229 – Published 1 July, 1980

DOI: https://doi.org/10.1103/PhysRevD.22.229

Abstract

The summing of all pion bubble graphs in the computation of the σ-meson propagator leads to the appearance of ghost poles when σππ coupling strengths are equivalent to σ-meson decay widths greater than 625.2 MeV. A result satisfying dispersion relations is obtained by the direct subtraction of the ghost pole from the results published previously by this author. The effect is to decrease the sensitivity to the σ-meson width of both the central and spin-orbit nucleon-nucleon potentials. The potentials are small for separations greater than half a pion Compton wavelength and decrease in magnitude with increasing width. Larger widths are more compatible with phenomenological and dispersion-theory potentials.

References (5)

  1. E. L. Lomon, Phys. Rev. D 14, 2402 (1976)
  2. Arthur S. Wightman (private communication)
  3. P. J. Redmond, Phys. Rev. 112, 1410 (1958)
  4. M. Gell-Mann and M. Lévy, Nuovo Cimento 16, 705 (1960)
  5. S. Weinberg, Phys. Rev. 177, 2604 (1969)

Outline

Information

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation