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

  • 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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M. Benayoun, L. Del Buono, B. P. David and O. Leitner. Can VMD improve the estimate of the muon g-2?[J]. Chinese Physics C, 2010, 34(6): 698-704. doi: 10.1088/1674-1137/34/6/015
M. Benayoun, L. Del Buono, B. P. David and O. Leitner. Can VMD improve the estimate of the muon g-2?[J]. Chinese Physics C, 2010, 34(6): 698-704.  doi: 10.1088/1674-1137/34/6/015 shu
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Received: 2010-01-20
Revised: 2010-03-30
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Can VMD improve the estimate of the muon g-2?

    Corresponding author: M. Benayoun,

Abstract: 

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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