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

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

1999-06-29

arxiv.org/abs/nucl-th/9906090v1

Phys.Rev. C60 (1999) 055206

Physics

Nuclear Physics

Nuclear Theory

17 pages, 5 figures, uses revtex and epsfig

Scientific paper

10.1103/PhysRevC.60.055206

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.

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