Author/Authors :
C.-C. Kuo، نويسنده , , S.-C. Kao، نويسنده , , A. Chen، نويسنده , , Edwina S. Uehara، نويسنده , , W.-T. Chen، نويسنده , , Belle Collaboration، نويسنده ,
Abstract :
Quasi-real two photon View the MathML source events are produced at the KEKB accelerator at an e+e−c.m. energy of 10.58 GeV, and are collected by the Belle detector. Preliminary results for γγ invariant mass (Wγγ) from 2 to 4 GeV/c2 are presented based 30.6 fb−1 of data. In comparison with the previous measurements, better statistics are archieved. This improvement will help to test QCD predictions.
