What does `rho-exchange' in piN scattering mean?

Abstract

We present an alternative method for calculating amplitudes for correlated pi pi exchange in the ``sigma'' and rho channel in piN scattering. Starting from a fixed mass meson exchange potential, we introduce the width of the exchanged particles by integrating over a mass spectral function. The spectral functions are constructed from the pseudoempirical N\bar{N} -> pi pi data. Using this approach we develop a prescription for resolving ambiguities of the correlated pi pi exchange in the rho channel that occur when different dispersion theoretical formulations of rho exchange are used to construct piN potentials.

17 pages, 5 figures, uses revtex and epsfig

References in corpus (6)

• The Spectral Function of the Rho Meson in Nuclear Matter
• A Microscopic Calculation of Photoabsorption Cross Sections on Protons and Nuclei
• Correlated $\pi \pi$ and $K\bar{K}$ exchange in the baryon-baryon interaction
• Role of correlated two-pion exchange in $K^{+}N$ scattering
• Enhancement of $\pi A\to \pi \pi A$ Threshold Cross Sections by In-Medium $\pi \pi$ Final State Interactions
• A dynamical model for correlated two-pion-exchange in the pion-nucleon interaction

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• Pion-nucleon scattering in a meson-exchange model
• Pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit Delta resonances
• Dynamical Coupled-Channels Effects on Pion Photoproduction
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• Light Baryon Spectroscopy
• Dynamical coupled-channels study of pi N --> pi pi N reactions