Existence of sigma meson in pi-pi scattering

Details Existence of sigma meson in pi-pi scattering Existence of sigma meson in pi-pi scattering

1997-02-13

arxiv.org/abs/hep-ph/9702332v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages (LaTeX), 2 PostScript figures (need epsf.tex). Talk given at 1996 International Workshop on ``Perspectives of Strong C

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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