Study of KS0 pair production in single-tag two-photon collisions

We report a measurement of the differential cross section of pi(0) pair productionin single-tag two-photon collisions, gamma*gamma -> pi(0) pi(0), in e(+) e(-) scattering. The cross section is measured for Q(2) up to 30 GeV2, where Q(2) is the negative of the invariant masssquared of the tagged photon, in the kinematic range 0.5 GeV < W < 2.1 GeV and vertical barcos theta* vertical bar< 1.0 for the total energy and pion scattering angle, respectively, in the gamma*gamma center-of-mass system. The results are based on a data sample of 759 fb(-1) collected with the Belle detector at the KEKBasymmetric-energy e(+) e(-) collider. The transition form factor of the f(0)(980) and that of the f(2)(1270) with the helicity-0, -1, and -2 components separately are measured for the first time and are compared with theoretical calculations.