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T: Fachverband Teilchenphysik

T 98: Topics in flavor physics

T 98.4: Vortrag

Freitag, 3. April 2020, 11:45–12:00, H-HS XII

Global analysis of e⁺e⁻ → cc in a K-matrix formalism — •Stephan Kürten — Tu München

A precise description of the spectrum of vector charmonia close to the open charm threshold is of phenomenological relevance to several open questions relating to the physics of heavy mesons. Examples include the search for exotic states, CP-violation in purely hadronic meson decays, and the prediction of b → s µ⁺µ⁻ decays with high-mass dimuons.
At the moment the best determination of the spectral parameters is based on an inclusive measurement by the BES collaboration. Here, I show how to extend the current analysis within the framework of the K-Matrix formalism through a simultaneous description of all the exclusive open charm final states. I will also discuss the effects of two particle thresholds, and the intrinsic probability conservation of the S-Matrix. I will present the results of a fit to all available data for e⁺e⁻ → open charm, and I will discuss further phenomenological applications of my results.