Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Hauptvorträge III

HK 36.2: Hauptvortrag

Donnerstag, 20. März 2014, 11:30–12:00, HZ 1+2

The muon g-2 and the Adler function from lattice QCD — •Gregorio Herdoiza — Institute of Nuclear Physics Johannes Gutenberg-Universität Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz, Germany

The anomalous magnetic moment of the muon, g−2, is one of the most promising observables to identify the signs for physics beyond the Standard Model. QCD contributions are currently responsible for a large fraction of the overall theoretical uncertainty in the determination of the muon g−2, and in the running of the QED coupling constant. The recent progress in determining these hadronic contributions from first principles by means of lattice QCD calculations will be reviewed. Studies of the vacuum polarisation function and of the Adler function in the low-energy regime which is essential for current phenomenological studies, as well as in a region of large momentum transfer will be considered. The latter energy regime can be used to match lattice QCD calculations to perturbation theory, thereby providing a way to determine the strong coupling constant.