New results on low energy exclusive hadronic final states from BABAR

摘要

The 3.6 standard deviation discrepancy between the standard model (SM) prediction for the muon anomalous magnetic moment g_(μ) - 2 and the corresponding experimental measurement is one of the most persistent and intriguing potential signals in particle physics for physics beyond the SM. The largest uncertainty in the SM prediction for g_(μ) - 2 arises from the uncertainty in the measured low energy inclusive e ~(+) e ~(-)→ hadrons cross section. New results from the BABAR experiment at SLAC for the e ~(+)e~(-)→ π ~(+) π ~(-) π ~(0) π ~(0)and e ~(+) e ~(-)→ KK ππ cross sections are presented that significantly reduce this uncertainty. New BABAR results for other low energy exclusive hadronic processes are also discussed.