Hadronic contributions to electroweak observables in the framework of DPT

Abstract

The hadronic contributions to the muon anomalous magnetic moment and to the shift of the electromagnetic fine structure constant at the scale of Z boson mass are evaluated within dispersively improved perturbation theory (DPT). The latter merges the corresponding perturbative input with intrinsically nonperturbative constraints, which originate in the respective kinematic restrictions. The obtained results conform with recent assessments of the quantities on hand.

Comments: Based on talks given at the 6th Workshop "Calculations for Modern and Future Colliders" (23 - 30 July 2015, Dubna, Russia) and the 17th Lomonosov Conference on Elementary Particle Physics (20 - 26 August 2015, Moscow, Russia); 6 pages, 2 figures