Study of ππ production in two-photon collisions at Belle

S.Uehara (for the Belle Collaboration)

doi:10.1088/1674-1137/32/6/019

Chinese Physics C> 2008, Vol. 32> Issue(6) : 499-503 DOI: 10.1088/1674-1137/32/6/019

Study of ππ production in two-photon collisions at Belle

S.Uehara (for the Belle Collaboration)

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

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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 χ_c0 production. We also make a preliminary discussion of the angular dependence and cross section ratio of γγ→π⁺π^－ and γγ→π⁰π⁰.

References

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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
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2008-01-17

Accepted Date: 1900-01-01

Available Online: 2008-06-05

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 χ_c0 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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Study of ππ production in two-photon collisions at Belle

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