An amplitude analysis of ππ scattering from new data on the reaction π-p→π+π-n

M. J. Corden, J. D. Dowell, J. Garvey, M. Jobes, I. R. Kenyon, J. Mawson, T. McMahon, I. F. Corbett, R. J. Esterling, N. H. Lipman, P. J. Litchfield, K. C.T.O. Sumorok, G. Alexander, S. Dagan, Y. Gnat, E. H. Bellamy, M. G. Green, N. Harnew, J. B. Lister, J. R. ListerA. W. Robertson, B. J. Stacey, J. A. Strong, D. H. Thomas

Research output: Contribution to journalArticlepeer-review

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°.

Original languageEnglish
Pages (from-to)250-272
Number of pages23
JournalNuclear Physics, Section B
Volume157
Issue number2
DOIs
StatePublished - 24 Sep 1979

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