Can VMD improve the estimate of the muon g-2? |
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作者姓名: | M. Benayoun L. Del Buono B. P. David O. Leitner |
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作者单位: | LPNHE des Universités Paris VI et VII, IN2P3—CNRS, Paris, 75005, France |
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摘 要: | We show that a VMD based theoretical input allows for a significantly improved accuracy for the hadronic vacuum polarization of the photon which contributes to the theoretical estimate of the muon g-2. We also show that the only experimental piece of information in the τ decay which cannot be accounted for within this VMD framework is the accepted value for Br(τ→ππvτ), while the T spectum lineshape is in agreement with expectations from e^+e^- annihilations.
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关 键 词: | 介子理论 VMD 估计 真空极化 基础理论 高精度 τ衰变 强子 |
收稿时间: | 2010-01-20 |
修稿时间: | 2010-03-30 |
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