Elsevier

Nuclear Physics B

Volume 157, Issue 2, 24 September 1979, Pages 250-272
Nuclear Physics B

An amplitude analysis of ππ scattering from new data on the reaction πp→π+πn

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Abstract

We have carried out a partial-wave analysis of ππ scattering in the mass range 1.0 to 2.08 GeV/c2. We find solutions similar to those obtained in previous analyses below 1.8 GeV/c2 but, in addition, we obtain a new solution which does not suffer from violations of unitarity and is compatible with data from other channels. This solution, when continued to 2.08 GeV/c2, shows a g meson with mass and width of 1.734± 0.010 GeV/c2and 0.322±0.035 GeV/c2 respectively, and an h meson with mass 1.935±0.013 GeV/c2and width 0.263±0.057 GeV/c2. The L = 2 partial wave contains the f meson and an additional resonance with parameters m = 1.502±0.025 Gev/c2, Γ = 0.165±0.042 GeV/c2and x = 0.19±0.03. If we associate this state with the f′(1514), our ππ branching fraction is considerably higher than previous determinations. An SU(3) fit to the 2+ nonet yields a mixing angle of 38.4± 1.3°.

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  • Cited by (0)

    1)

    Now at University of Birmingham.

    2)

    Supported by the Israel Academy of Science and Humanities, the Israel Commission for Basic Research.

    3)

    Now at the Rutherford Laboratory.

    4)

    Now at Carnegie Mellon University, USA.

    5)

    Now at CERN, Geneva, Switzerland.

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