New BaBar results on e+ e- --> pi+ pi- and the muon magnetic moment

by Michel Davier (LAL-Orsay)

Tuesday 22 Sept 2009, 16:30 → 17:30 Europe/Zurich

Main Auditorium** (CERN)

A new precise measurement of the e+ e- --> pi+ pi- cross section using the Initial State Radiation method has just been released by the BaBar Collaboration. This analysis presents several advantages over previous determinations. The new data has a strong impact on the calculation of the contribution from hadronic vacuum polarization to the Standard Model prediction of the muon magnetic moment. The state of the comparison with the direct measurement will be discussed.

Joint EP/PP seminar - 2009 http://smaria.home.cern.ch/smaria/ppep/ppep.htm

Poster EPPPSeminar22092009.pdf

Slides cern-seminar.pdf cern-seminar.ppt