Abstract
We have measured the cross section for π + π − production in two-photon collisions using a data sample with an integrated luminosity of 85.9 fb −1 collected with the Belle detector. The f 0 (980) resonance is observed as a peak in the energy spectrum of the cross section. We also report preliminary results for γγ → π 0 π 0 with two-photon center-of-mass energies ranging from 0.6 to 4.0 GeV, based on a 95 fb −1 data sample.
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