High-statistics study of $K^0_S$ pair production in two-photon collisions

The Belle collaboration
Uehara, S. , Watanabe, Y. , Nakazawa, H. , Adachi, I. , Aihara, H. , Asner, D.M. , Aulchenko, V. , Aushev, T. , Bakich, A.M. , Bala, A.
PTEP 2013 (2013) 123C01, 2013.

Abstract (data abstract)
KEK-KEKB. Measurement of the differential cross section for the process GAMMA GAMMA --> K0S K0S in the W range 1.05-4.00 GeV. The analysis uses a data sample of intergated luminosity 972 fb-1 from the KEKB asymmetric-energy collider operated at and near the Upsilon resonance region. As well as the differential cross sections as a function of cos(theta) covering the whole W range, the integrated cross sections as a function of W are given for two lower cos(theta) cut-offs.

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