High-statistics measurement of neutral-pion pair production in two-photon collisions

Details High-statistics measurement of neutral-pion pair production in two-photon collisions High-statistics measurement of neutral-pion pair production in two-photon collisions

2008-10-03

arxiv.org/abs/0810.0655v1

Phys.Rev.D78:052004,2008

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 4 figures, proceedings to poster session at ICHEP08, Jul.29-Aug.5, 2008, Philadelphia, PA, USA

Scientific paper

10.1103/PhysRevD.78.052004

We have measured the cross section for pi^0 pi^0 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 f_0(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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