Another look at $ππ$ scattering in the scalar channel

Details Another look at $ππ$ scattering in the scalar channel Another look at $ππ$ scattering in the scalar channel

1998-07-10

arxiv.org/abs/hep-ph/9807326v1

Phys.Rev.D59:034005,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 5 figures, REVTeX

Scientific paper

10.1103/PhysRevD.59.034005

We set up a general framework to describe $\pi\pi$ scattering below 1 GeV based on chiral low-energy expansion with possible spin-0 and 1 resonances. Partial wave amplitudes are obtained with the $N/D$ method, which satisfy unitarity, analyticity and approximate crossing symmetry. Comparison with the phase shift data in the J=0 channel favors a scalar resonance near the $\rho$ mass.

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