D-Dbar mixing and new physics: general considerations and constraints on the MSSM

Abstract

Combining the recently available experimental evidence of D-Dbar mixing, we extract model-independent information on the mixing amplitude and on its CP-violating phase. Using this information, we present new constraints on the flavour structure of up-type squark mass matrices in supersymmetric extensions of the Standard Model.

Figures (3)

• Figure 1: Probability density functions of the combined fit from Tab. \ref{['tab:exp']}. Dark (light) regions correspond to $68\%$ ($95\%$) probability.
• Figure 2: Probability density functions of the combined fit from Tab. \ref{['tab:exp']}, projected on $y$ vs $x$ (top left), $\phi$ vs $\vert q/p \vert-1$ (top right), $\Phi_{12}$ vs $\vert M_{12} \vert$ (center left), $A_\mathrm{NP}$ vs $\phi_\mathrm{NP}$ (center right), $A_\mathrm{NP}$ (bottom left) and $\phi_\mathrm{NP}$ (bottom right). Dark (light) regions correspond to $68\%$ ($95\%$) probability.
• Figure 3: Selected regions in the Re$\left( \delta_{12}^u \right)_{AB}$--Im$\left( \delta_{12}^u \right)_{AB}$ planes and probability density functions for Abs$\left( \delta_{12}^u \right)_{AB}$ for $AB=LL$, $AB=LR$, $AB=LL=RR$. Dark (light) regions correspond to $68\%$ ($95\%$) probability. See the text for details.