Simple Description of Pion-Pion Scattering to 1 GeV

Masayasu Harada, Francesco Sannino, Joseph Schechter

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Abstrakt

Motivated by the 1/Nc expansion, we present a simple model of pion-pion scattering as a sum of a `current-algebra' contact term and resonant pole exchanges. The model preserves crossing symmetry as well as unitarity up to 1.2 GeV. Key features include chiral dynamics, vector meson dominance, a broad low energy scalar (sigma) meson and a `Ramsauer-Townsend' mechanism for the understanding of the 980 MeV region. We discuss in detail the `regularization' (corresponding to rescattering effects) necessary to make all these nice features work.
OriginalsprogEngelsk
Artikelnummer1991
TidsskriftPhysical Review D
Vol/bind54
Udgave nummer3
ISSN2470-0010
DOI
StatusUdgivet - 1. aug. 1996
Udgivet eksterntJa

Bibliografisk note

35 pages (LaTeX), 13 PostScript figures are included as uuencoded-compressed-tar

Emneord

  • hep-ph
  • nucl-th

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