Can VMD improve the estimate of the muon g-2?

被引:0
|
作者
M.Benayoun [1 ]
L.Del Buono [1 ]
B.P.David [1 ]
O.Leitner [1 ]
机构
[1] LPNHE des Universits Paris VI et VII
关键词
VMD; isospin symmetry breaking; g-2;
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中图分类号
O572.33 [介子];
学科分类号
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→ππντ),while the τ spectum lineshape is in agreement with expectations from e+e-annihilations.
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页码:698 / 704
页数:7
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