Pi Pi scattering in an effective chiral Lagrangian

Details Pi Pi scattering in an effective chiral Lagrangian Pi Pi scattering in an effective chiral Lagrangian

1996-06-14

arxiv.org/abs/hep-ph/9606331v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages (LaTeX), 4 PostScript figures are included as uuencoded-compressed-tar file at the end (need epsf.tex). Talk given at

Scientific paper

In this talk I summarize a recently proposed mechanism to understand pi pi
scattering to 1 GeV. The model is motivated by the 1/Nc expansion to QCD, and
includes a current algebra contact term and resonant pole exchanges. Chiral
symmetry plays an important role in restricting the form of the interactions.
The existence of a broad low energy scalar (sigma) is indicated.

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