High-statistics measurement of neutral-pion pair production in two-photon collisions
Belle Collaboration
刊名PHYSICAL REVIEW D
2008
卷号78期号:5
关键词KLOE DETECTOR GAMMA-GAMMA BELLE DECAY PHI ENERGIES MESONS MODEL K+K KK
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.78.052004
通讯作者Uehara, S (reprint author), KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan.
英文摘要We present a high-statistics measurement of differential cross sections and the total cross section for the process gamma gamma -> pi(0)pi(0) in the kinematic range 0.6 GeV <= W <= 4.0 GeV and vertical bar cos theta*vertical bar <= 0.8, where W and theta* are the energy and pion scattering angle, respectively, in the gamma gamma center-of-mass system. Differential cross sections are fitted to obtain information on S, D(0), D(2), G(0), and G(2) waves. The G waves are important above W similar or equal to 1.6 GeV. The general behavior of partial waves is studied by fitting differential cross sections in a simple parametrization where amplitudes contain resonant contributions and smooth background. The D(2) wave is dominated by the f(2)(1270) meson whose parameters are consistent with the current world averages. The D(0) wave contains a f(2)(1270) component, whose fraction is fitted. For the S wave, the f(0)(980) parameters are found to be consistent with the values determined from our recent pi(+) pi(-) data. In addition to the f(0)(980), the S wave prefers to have another resonance-like contribution whose parameters are obtained.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000259692600011
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被引频次:60[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/212874
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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Belle Collaboration. High-statistics measurement of neutral-pion pair production in two-photon collisions[J]. PHYSICAL REVIEW D,2008,78(5).
APA Belle Collaboration.(2008).High-statistics measurement of neutral-pion pair production in two-photon collisions.PHYSICAL REVIEW D,78(5).
MLA Belle Collaboration."High-statistics measurement of neutral-pion pair production in two-photon collisions".PHYSICAL REVIEW D 78.5(2008).
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