Speaker
Description
The Belle II experiment is located in Tsukuba, Japan along the SuperKEKB e+e− collider, which achieved in 2020 the world's highest instantaneous luminosity and is aiming to reach in the years to come an instantaneous luminosity of 8×1035cm−2s−1, a value ∼40 times larger than the instantaneous luminosity delivered for the previous experiment (Belle). Compared to Belle, the Belle II experiment also has an improved vertex detector that can be used as a stand-alone tracking device and offers a better impact parameter resolution. This presentation gives a brief overview of the Belle II tracking system and shows a measurement of the impact parameter resolution and of several properties of the interaction point using a selection of e+e−→e+e− and e+e−→μ+μ− events collected in 2019 and 2020 at a centre-of-mass energy of 10.6 GeV.
