Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 30: Hadron Structure and Spectroscopy VI
HK 30.6: Vortrag
Donnerstag, 19. März 2026, 15:30–15:45, PHIL A 401
Track Reconstruction Performance Studies of Electrons at the BESIII Experiment — •Silas Benedikt Debus, Achim Denig, and Christoph Florian Redmer — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz
The investigation of hadron production in two-photon collisions at e+e− colliders is essential to provide further input to the data-driven calculations of the hadronic Light-by-Light (HLbL) contribution to the anomalous magnetic moment of the muon aµ. In order to provide reliable information as a function of the momentum transfer, excellent knowledge of the tracking efficiency of the scattered electrons is mandatory.
The BESIII experiment, located at the Institute of High Energy Physics in Beijing, China, has collected more than 20 fb−1 of e+e− collision data at a center-of-mass energy of 3.773 GeV, which is perfectly suited to study two-photon reactions at momentum transfers of O(1 GeV2). Since these processes predominantly occur at small scattering angles, we report in this presentation a combined study of track reconstruction and particle identification efficiencies for electrons in the relevant angular region of the BESIII detector, using the process e+e− → e+e− γ as reference reaction. — Supported by DFG FOR5327
Keywords: Electron; Tracking; Efficiency; BESIII