Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Instrumentation XIII
HK 49.4: Vortrag
Mittwoch, 30. März 2022, 16:45–17:00, HK-H5
Construction of the crystal Zero Degree Detector for BESIII
— •Frederic Stieler1, Achim Denig1, Peter Drexler1, Leonard Koch2, Wolfgang Kühn2, Werner Lauth1, Jan Muskalla1, Saskia Plura1, Christoph Florian Redmer1, and Yasemin Schelhaas1 — 1Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Deutschland — 2II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Deutschland
The crystal Zero Degree Detector (cZDD) is a proposed addition to the BESIII experiment in China. In order to measure hadronic cross sections with the Initial State Radiation (ISR) method for a more precise calculation of the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon, ISR photons have to be detected. Since these photons are mostly emitted at small angles in relation to the colliding particles, the cZDD will measure these photons at angles of about 1.5 mrad to 10.4 mrad, that are not covered yet by the already existing detectors at BESIII.
In this presentation the design of the first prototype of the cZDD is discussed and further steps are motivated.