Study of ππ production in two-photon collisions at Belle

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S.Uehara (for the Belle Collaboration). Study of ππ production in two-photon collisions at Belle[J]. Chinese Physics C, 2008, 32(6): 499-503. doi: 10.1088/1674-1137/32/6/019
S.Uehara (for the Belle Collaboration). Study of ππ production in two-photon collisions at Belle[J]. Chinese Physics C, 2008, 32(6): 499-503.  doi: 10.1088/1674-1137/32/6/019 shu
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Received: 2008-01-17
Revised: 1900-01-01
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Study of ππ production in two-photon collisions at Belle

  • IPNS-KEK; Institute of Particle and Nuclear Studies; High Energy Accelerator Research Organization; Tsukuba; Japan

Abstract: 

We have measured the cross section for π+π production in two-photon collisions using a data sample with an integrated luminosity of 85.9fb-1 collected with the Belle detector. The f0(980) resonance is observed as a peak in the energy spectrum of the cross section. We also report preliminary results for γγ→π0π0 with two-photon center-of-mass energies ranging from 0.6 to 4.0GeV, based on a 95fb-1 data sample. We find at least four resonant structures including a peak from f0(980). In addition, there is evidence for χc0 production. We also make a preliminary discussion of the angular dependence and cross section ratio of γγ→π+π and γγ→π0π0.

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