What does {open_quotes}{rho} exchange{close_quotes} in {pi}N scattering mean?

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.60.055206· OSTI ID:688071

Krehl, O; Krewald, S; Speth, J ^[1]; Hanhart, C ^[2]

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1. Institut fuer Kernphysik, Forschungszentrum Juelich GmbH, D-52425 Juelich (Germany)
2. Department of Physics and INT, University of Washington, Seattle, Washington 98195 (United States)

We present an alternative method for calculating amplitudes for correlated {pi}{pi} exchange in the {open_quotes}{sigma}{close_quotes} and {rho} channel in {pi}N 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}{r_arrow}{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 {pi}N potentials. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 688071
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 60; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COUPLING CONSTANTS
DISPERSION RELATIONS
NUCLEON-ANTINUCLEON INTERACTIONS
PION-NUCLEON INTERACTIONS
SPECTRAL FUNCTIONS