Acta Physica Polonica B

Vol. 37, No. 3, March 2006, page 887


Measurements of \gamma \gamma \rightarrow K0SK0S and Charmonium Production at BELLE

W.T. Chen, S. Uehara

We use data samples collected with the Belle detector at the KEKB e+e- collider at 397 fb-1 integrated luminosity to measure the cross sections and angular distributions of K0SK0S production in two-photon collisions at the center-of-mass energy (W) and angle (\theta *) ranges, 2.4 GeV<4.0 GeV and | \cos \theta *|<0.6. A \sin -4\theta * behavior of the cross section in the region 2.4 GeV < 4.0 GeV is observed. Signals of \chi c0 and \chi c2 are also observed. Furthermore, new resonance Z(3930) is observed in \gamma \gamma \rightarrow D\overline {D} process using data corresponding to 280 fb-1 integrated luminosity.

PACS numbers: 13.60.--r, 14.40.Lb



 
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