A New Analysis of the pi+pi- and pi0pi0 Data

Details A New Analysis of the pi+pi- and pi0pi0 Data A New Analysis of the pi+pi- and pi0pi0 Data

2002-07-04

arxiv.org/abs/hep-ph/0207064v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure, talk given at the Seventh Int. Workshop Meson 2002, Cracow, Poland, May 24-28, 2002

Scientific paper

A joint analysis of the pi+pi- and pi0pi0 S-wave amplitudes including results of three experiments has been performed. Using our theoretical model of the pion-pion production in which not only the pion exchange but also the a1(1260) meson exchange were taken into account we have obtained a unique solution (called "down-flat") for the scalar-isoscalar phase shifts. Thus a long-standing problem of ambiguities in the S-wave isoscalar amplitude has been finally resolved and the second ("up-flat") solution was eliminated.

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