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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Hadron Structure and Spectroscopy 5

HK 27.1: Gruppenbericht

Dienstag, 24. März 2015, 14:30–15:00, T/SR19

Open-charm Physics Opportunities at PANDA — •Elisabetta Prencipe¹, Lu Cao¹, Andreas Herten¹, James Ritman¹, Donghee Kang², and Andreas Pitka³ for the PANDA collaboration — ¹IKP - Forschungszentrum Juelich — ²Johannes Gutenberg Universität Mainz — ³Justus-Liebig Universität Giessen

Open-charm physics is of high interest for the weak and the strong interactions. New observations in spectroscopy and the recent constraining limits on CP violation in the D sector strongly motivate the study of open-charm physics. The experiment PANDA at FAIR (Darmstadt) will investigate fundamental questions of hadron and nuclear physics in interactions of antiprotons with nucleons and nuclei. Among other topics, original contributions are planned from PANDA in the open-charm sector. With high average reaction rates up to 2·10⁷ interactions/s, and a factor 20 higher mass resolution than attained at B-factories, PANDA is in a privileged position to perform measurements of widths of narrow states, such as the D_s(2317)⁺ and the D_s(2460)⁺, and form factors in semileptonic D_s decays. Very rare processes (e.g. D⁰ → γ γ) can be accessible with unprecedented accuracy. In addition, the search for new physics is a challenge that PANDA can take, for example with the study of the mixing in the D sector, analyzing the channel p p → ψ(3770) → D⁰ D⁰. PANDA is expected to be decisive to answer on these and second-order open questions. A general overview of the benchmark channels in the D sector with PANDA is given in this report, showing the results of recent PandaRoot simulations.