Physics Letters B (Sep 2014)

Two photon couplings of the lightest isoscalars from BELLE data

  • Ling-Yun Dai,
  • M.R. Pennington

DOI
https://doi.org/10.1016/j.physletb.2014.07.005
Journal volume & issue
Vol. 736, no. C
pp. 11 – 15

Abstract

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Amplitude Analysis of two photon production of ππ and K¯K, using S-matrix constraints and fitting all available data, including the latest precision results from Belle, yields a single partial wave solution up to 1.4 GeV. The two photon couplings of the σ/f0(500), f0(980) and f2(1270) are determined from the residues of the resonance poles. These amplitudes are a key input into the newly developed dispersive approach to calculating hadronic light-by-light scattering for (g−2) of the muon.