Measurement of the pion form factor for M2ππ between 0.1 and 0.85 GeV2 with the KLOE detector

The KLOE experiment at the φ-factory DAφNE has measured the pion form factor in the range between 0.1 <>< 0.85="" gev2="" using="" events="" taken="" at="" √s="1" gev="" with="" a="" photon="" emitted="" at="" large="" polar="" angles="" in="" the="" initial="" state.="" this="" measurement="" extends="" the="" mππ2="" region="" covered="" by="" kloe="" isr="" measurements="" of="" the="" pion="" form="" factor="" down="" to="" the="" two="" pion="" production="" threshold.="" the="" value="" obtained="" in="" this="" measurement="" of="" the="" dipion="" contribution="" to="" the="" muon="" anomalous="" magnetic="" moment="" of="" △aμππ="(478.5±2.0stat±4.8syst±2.9theo)·10-10" further="" confirms="" the="" discrepancy="" between="" the="" standard="" model="" evaluation="" for="" aμ="" and="" the="" experimental="" value="" measured="" by="" the="" (g-2)="" collaboration="" at="" bnl.="">