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Can VMD improve the estimate of the muon g-2?
作者姓名:M. Benayoun  L. Del Buono  B. P. David  O. Leitner
作者单位:LPNHE des Universités Paris VI et VII, IN2P3—CNRS, Paris, 75005, France
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.

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:2010-1-20
修稿时间:2010-3-30
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