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T: Fachverband Teilchenphysik
T 35: Electroweak Physics I (Weak Mixing Angle, Tau Production)
T 35.2: Talk
Tuesday, April 1, 2025, 16:30–16:45, VG 2.103
The weak mixing angle at the Belle II experiment — •Lukas Grußbach1,2, Stephan Paul1, and Daniel Greenwald1 — 1Technical University Munich — 2Max Planck Institute for Physics
The weak mixing angle is known precisely only at high energies around the Z0 mass. At much lower energies, NuTeV measured a value deviating from the standard-model prediction. At Belle II, we want to measure the weak mixing angle at a similar energy using the process e+e− → µ+µ−.
I present concepts of such a measurement at Belle II.
*Funded by the DFG under Germany’s Excellence Strategy -
EXC2094 - 390783311 and BMBF Verbundforschung (05H21WOKBA BELLE2).
Keywords: Belle II; weak mixing angle