Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 71: Theorie: Flavorphysik

T 71.8: Talk

Wednesday, March 27, 2019, 17:45–18:00, H11

Testing the standard model with the photon polarization in radiative charm decays — •Nico Adolph, Gudrun Hiller, and Andrey Tayduganov — TU Dortmund, Deutschland

We study the photon polarization in radiative charm decays with an up-down asymmetry in the decays D_(s)⁺ → K₁⁺ (→ K π π) γ. Angular distributions of the three body decay are used to determine the polarization of the K₁⁺ which is correlated to the photon polarization. While the D⁺ decay is SM like, the D_s decay is sensitive to BSM physics in the c → u γ coupling, which induces differences in the up-down asymmetries between these two decays, as a signature of new physics.