Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 35: Electroweak Physics I (Weak Mixing Angle, Tau Production)

T 35.2: Vortrag

Dienstag, 1. April 2025, 16:30–16:45, VG 2.103

The weak mixing angle at the Belle II experiment — •Lukas Grußbach^1,2, 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