Measuring the Weinberg Angle at the Belle II Experiment

by Lukas Grußbach (TUM)

Thursday 4 Jul 2024, 09:30 → 10:30 Europe/Berlin

E18/ENE Seminar Room 3268 (TUM PH)

The Weinberg angle is a fundamental parameter of the standard model of particle physics. It has been measured with high precision at LEP and SLC. However, its running behavior to lower energies is less well measured. And in 2002, the NuTeV collaboration measured a deviation from the expected behavior which has not been resolved to date. Since then, theorists have pointed to systematic effects that could change the NuTeV measurement.
My goal is to measure the Weinberg angle at the Belle II experiment in Japan to provide an additional measurement. This measurement is independent from the NuTeV and is therefore unaffected by the suspected effects in the NuTeV measurement.
I will show how I plan to measure the Weinberg angle and how to deal with two relevant systematic uncertainties that affect this measurement.