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Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 15: Search for new particles I

T 15.2: Vortrag

Montag, 30. März 2020, 16:45–17:00, H-HS XVI

Searching for Dark Sector Particles in Muon Pair Production at BESIII — •Daniela Becker, Achim Denig, and Christoph Florian Redmer for the BESIII collaboration — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Germany

Discrepancies between the Standard Model prediction and the results of precision measurements, such as the Muon (g-2)-anomaly, may hint at the limits of the otherwise successful theory. Models proposed to compensate the observed discrepancies suggest a so-called Dark Sector of new fundamental particles and interactions with a suppressed coupling to the Standard Model.

The BESIII experiment at the BEPCII electron-positron collider in Beijing, China, has collected large samples within the τ-charm region, providing excellent requirements for the study of muonic final states. The talk will report on such a study on the search for the massive Dark Photon (Z′), postulated to couple to the heavy Standard Model leptons and thus might be identified as a narrow resonance in the invariant mass spectrum of muon pairs. — Supported by DFG SFB1044.

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