| Precise measurement of the e^＋e^- →π^＋π^-（γ） cross section with the initial state radiation method at BABAR |
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| 引用本文： | 王文峰.Precise measurement of the e^＋e^- →π^＋π^-（γ） cross section with the initial state radiation method at BABAR[J].中国物理 C,2010,34(6):692-697. |
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| 作者姓名： | 王文峰 |
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| 作者单位： | University of Notre Dame; SLAC, 2575 Sand Hill Road, Menlo Park, CA 94025, USA |
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| 摘 要： | We present a precise BABAR measurement on the cross section of the process e^＋e^- →π^＋π^-（γ） from threshold to an energy of 3 GeV with the initial state radiation （ISR） technique, using 232 fb^-1 of data collected with the BABAR detector at e^＋e^- center-of-mass energies near 10.58 GeV. The ISR luminosity is determined from a study of the leptonic process e^＋e^- →μ^＋μ^-γ（γ）. The leading-order hadronic contribution to the muon magnetic anomaly calculated using the ππ cross section measured from threshold to 1.8 GeV is （514.1± 2.2（stat） ± 3.1（syst）） × 10^-10.
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| 关 键 词： | 初始状态 截面测量 辐射法 精确测量 π 电子 能量收集 断面测量 |
| 收稿时间： | 2010-1-26 |
Precise measurement of the e^＋e^- →π^＋π^-（γ） cross section with the initial state radiation method at BABAR |
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| Abstract: | pion form factor, ISR, g-2, BABAR |
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| Keywords: | pion form factor ISR g-2 BABAR |
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