Dresden 2013 – scientific programme

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T: Fachverband Teilchenphysik

T 18: Flavourphysik (Theorie) 1

T 18.9: Talk

Monday, March 4, 2013, 13:00–13:15, WIL-B122

CP Violation in Charm Meson Decays - A signal of New Physics? — •Philipp Frings — Institut für Theoretische Teilchenphysik (TTP), Karlsruhe, Deutschland

Recent measurements of the observable Delta A_CP deviate significantly from the naive Standard Model expectation and might represent a sign of new physics. It is necessary to evaluate whether this deviation is actually due to new physics or whether it can be accommodated in the Standard Model.

In this talk, we discuss a possible explanation of Delta A_CP within the SM with the diagrammatic approach. Different D Meson decays can be related by the SU(3) flavor symmetry which can be used to express all charm decay amplitudes by a small number of parameters (topologies). We use this approach and will find that it leads us to a framework in which an unexpectedly large value for Delta A_CP arises.