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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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Contributor : Swarna Bassava <>
Submitted on : Tuesday, March 2, 2010 - 2:40:47 PM
Last modification on : Friday, April 16, 2021 - 9:15:32 AM

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M. Benayoun, L. del Buono, P. David, O. Leitner. Can VMD improve the estimate of the muon g-2 ?. Chinese Physics C, IOP Publishing, 2010, 34, pp.698. ⟨10.1088/1674-1137/34/6/015⟩. ⟨in2p3-00460791⟩



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