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

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 $\tau$ decay which cannot be accounted for is the accepted value for ${\rm Br}(\tau \ra \pi \pi \nu_\tau)$, while the spectum lineshape is in agreement with expectations from $e^+ e^-$ annihilations.
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http://hal.in2p3.fr/in2p3-00460791
Contributor : Swarna Bassava <>
Submitted on : Tuesday, March 2, 2010 - 2:40:47 PM
Last modification on : Saturday, December 19, 2020 - 11:32:02 AM

### Identifiers

• HAL Id : in2p3-00460791, version 1
• ARXIV : 0912.1248

### Citation

M. Benayoun, L. del Buono, P. David, O. Leitner. Can VMD improve the estimate of the muon g-2 ?. 2010. ⟨in2p3-00460791⟩

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