Measuring the Leading Order Hadronic Contribution to the Muon g-2 in the Space-like Region
G. Venanzoni · Frascati Phys.Ser. · 2016
After reviewing the traditional way of computing the leading order hadronic correction to the muon g− 2 through a dispersive approach via time-like data, I will present a novel approach, based on the measurement of the effective electromagnetic coupling in the space-like region extracted from Bhabha scattering data. We argue that this new method may become feasible at flavor factories, resulting in an alternative determination potentially competitive with the accuracy of the present results obtained with the dispersive approach via time-like data. 1 The Muon g-2 The muon anomaly aμ = (g − 2)/2 is a low-energy observable, which can be both measured and computed to high precision 1). Therefore it provides an