Precise determination of the low-energy hadronic contribution to the muon $g-2$ from analyticity and unitarity: An improved analysis

B. Ananthanarayan, Irinel Caprini, Diganta Das +1

The two-pion low-energy contribution to the anomalous magnetic moment of the muon, $a_{\mu }\equiv (g-2{)}_{\mu }/2$, expres sed as an integral over the modulus squared of the pion electromagne…