Speaker
Mr
Maurice Benayoun
(LPNHE des Universites Paris 6 et 7)
Description
The HLS model supplemented with suitable SU(2)/SU(3) breaking schemes
allows to build a phenomenological model which encompasses six e+e-
annihilation channels (pi+ pi-, K+ K-, K0 K0bar, pi0
gamma, eta gamma, pi+ pi-pi0),
the dipion spectrum in the tau decay and a few more meson annihilation
partial width information. One thus yields a simultaneous
description of all these physics channels by means of quite
successful global fits of all the corresponding data.
The fit results provide the six corresponding
annihilation cross sections up to 1.05 GeV. This is used to
determine accurately the leading order hadronic vacuum
polarisation contribution up to the phi region. Supplementing
this with additional information covering the
physics channels falling outside the scope our model, one
derives an improved estimate of the muon g-2. The
data samples recently collected by KLOE play an important
role in this improvement
Primary author
Mr
Maurice Benayoun
(LPNHE des Universites Paris 6 et 7)
