Two photon physics at Belle

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Results of high statistic two-photon collisions at Belle are presented. Only γγ → hh̄ process is included in this report, here hh̄ could be π+π-, K+K-, Ks0Ks0, DD̄, pp̄, ΛΛ or Σ0Σ0. Measurements of Γγγ→RB(R → hh̄) for charmonia resonance states are listed. A new χc2′ candidate in γγ → DD̄ has been identified as a spin-2 (helicity-2) object. Cross section and production angle distributions are measured and compared with various QCD calculations.

Original languageEnglish
Pages (from-to)5543-5551
Number of pages9
JournalInternational Journal of Modern Physics A
Issue number27
StatePublished - 30 Oct 2006


  • QCD
  • Two-photon collision


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