High-statistics measurement of neutral-pion pair production in two-photon collisions
Abstract
We have measured the cross section for pi0 pi0 production in two-photon collisions using a data sample with an ntegrated luminosity of 95 fb-1 collected with the Belle detector. We find at least four resonant structures including a peak from f0(980), and a fitting of the result to partial-wave amplitudes assuming some resonances are applied. We also make a discussion on the higher-energy region data based on the preliminary results from an increased sample corresponding to the integrated luminosity of 223 fb-1.
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