Understanding η'→ηππ and allied processes despite adler zeros

Santhanam, I. ; Chakrabarty, S. ; Mitra, A. N. (1979) Understanding η'→ηππ and allied processes despite adler zeros Physical Review Letters, 43 (10). pp. 661-664. ISSN 0031-9007

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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.43.661

Related URL: http://dx.doi.org/10.1103/PhysRevLett.43.661


With use of the (hitherto obscure) negative-parity meson matrix N+ of partial symmetry, an η'→ηππ amplitude, explicitly satisfying the Adler conditions, has been constructed within the relativistic quark pair-creation model without any adjustable parameters. The model yields a total η' width of 388 keV and ηππ, ρ0γ, and γγ branching ratios of 68.0%, 29.9%, and 1.88%, all in excellent agreement with data. The same model gives the π-π scattering lengths as mπa0=0.19, mπa2=0.08.

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