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Journal Articles Physics Letters B Year : 2003

Elimination of ambiguities in pion-pion phase shifts using crossing symmetry

R. Kaminski
  • Function : Author
L. Lesniak
  • Function : Author

Abstract

Roy's equations, which incorporate crossing symmetry of the pion-pion scattering amplitudes, are used to resolve the present ambiguity between two solutions for the scalar-isoscalar phase shifts below 1 GeV. It is shown that the "down-flat" solution satisfies well Roy's equations and consequently crossing symmetry while the other solution called "up-flat" does not and thus should be eliminated.

Dates and versions

in2p3-00192260 , version 1 (27-11-2007)

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R. Kaminski, L. Lesniak, B. Loiseau. Elimination of ambiguities in pion-pion phase shifts using crossing symmetry. Physics Letters B, 2003, 551, pp.241-248. ⟨10.1016/S0370-2693(02)03021-6⟩. ⟨in2p3-00192260⟩
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