Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 65: Experimentelle Methoden II

T 65.6: Talk

Wednesday, March 27, 2019, 17:15–17:30, S01

Bremsstrahlung finding at Belle II — Florian Bernlochner¹, Nils Braun¹, •Patrick Ecker¹, Torben Ferber², and Thomas Hauth¹ — ¹ETP, KIT, Karlsruhe — ²DESY, Hamburg

For the physics studies that will be performed at the Belle II experiment in Tsukuba, Japan, a precise reconstruction of charged particle trajectories is of the utmost importance. Electron tracks are highly relevant here, as such are used in many new physics analyses or Standard Model parameter measurements. The quality of the reconstruction of electron tracks is however affected by energy losses due to bremsstrahlung processes. Therefore a new algorithm for identifying bremsstrahlung photons during the reconstruction, using the combined information from the track reconstruction and the electromagnetic calorimeter of the Belle II detector, was developed and tested. This talk presents the concept of the algorithm along with first results to what extent the resolution of the extracted parameters of the electron tracks can be improved.