[SEMINARI] SEMINAR: Gilberto Colangelo, The hadronic vacuum polarization contribution to the muon (g-2) from below 1 GeV

[German Rodrigo Garcia]

The hadronic vacuum polarization contribution to the muon (g-2) 
from below 1 GeV

Gilberto Colangelo
Univ. Bern
Monday, 12 of March of 2007     12:00 PM
IFIC's Seminar

Abstract

The hadronic vacuum polarization contribution to the (g-2) is the source 
of the largest uncertainty in the Standard Model calculation. Its 
evaluation is based on data on $e^+ e^- \to$ hadrons (or $\tau$ hadronic 
decays). I will discuss a method to evaluate the dominant contribution of 
two pions below 1 GeV which relies on data, but uses also theoretical 
input, namely, chiral symmetry, analyticity and unitarity. It will be 
shown, in particular, that the bound on the inelastic contributions 
discussed by Eidelman and Lukaszuk plays an important role.