High-statistics measurement of neutral-pion pair production in two-photon collisions
文献类型：期刊论文
| 作者 | Belle Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2008 |
| 卷号 | 78期号:5 |
| 关键词 | KLOE DETECTOR GAMMA-GAMMA BELLE DECAY PHI ENERGIES MESONS MODEL K+K KK |
| 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. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000259692600011 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212874]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 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). |
入库方式： OAI收割
来源：高能物理研究所
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