Pi-pi scattering at low energy: S-wave phase shifts and scattering lengths

Details Pi-pi scattering at low energy: S-wave phase shifts and scattering lengths Pi-pi scattering at low energy: S-wave phase shifts and scattering lengths

2003-08-15

arxiv.org/abs/hep-ph/0308162v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 4 postscript figures, LaTeX; typos corrected, references updated and expanded, added more material in Sect.3

Scientific paper

It is shown that the linear correlation relates the S-wave phase shifts from
the threshold up to dipion mass 900 MeV. By using this correlation at the
solution of the Roy equations, the accuracy of determination of S-wave lengths
is considerably improved. The obtained result unambiguously witnesses in favor
of the standard ChPT version with large quark condensate.

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