Revisiting D0-D0bar mixing using U-spin

Abstract

We prove that $D^0$-${\bar{D}}^0$ mixing in the standard model occurs only at second order in U-spin breaking. The U-spin subgroup of SU(3) is found to be a powerful tool for analyzing the cancellation of intermediate-state contributions to the $D^0$--$\od^0$ mixing parameter $y=\Delta \Gamma /(2\Gamma )$. Cancellations due to states {\it within a single U-spin triplet} are shown to be valid to first order in U-spin breaking. Illustrations are given for triplets consisting of (a) pairs of charged pions and kaons; (b) pairs of neutral pseudoscalar members of the meson octet; (c) charged vector-pseudoscalar pairs, and (d) states of four charged kaons and pions.

corrected fonts for {\cal B}

References in corpus (1)

• Direct CP Violation in D Decays in view of LHCb and CDF Results

Cited by in corpus (13)

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• Observation of CP violation in $D^0\to K^{-}{\pi }^{+}$ as a smoking gun for New Physics
• Recent advances in charm mixing and $CP$ violation at LHCb
• Quark-hadron duality for heavy meson mixings in the 't Hooft model
• New physics in singly Cabibbo-suppressed D decays
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• A Review of $CP$ Violation Measurements in Charm at LHCb