CP Violation and Flavor SU(3) Breaking in D-meson Decays

Details CP Violation and Flavor SU(3) Breaking in D-meson Decays CP Violation and Flavor SU(3) Breaking in D-meson Decays

2011-12-22

arxiv.org/abs/1112.5451v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 6 figures, typos corrected, reference added, discussion slightly expanded

Scientific paper

We carry out a systematic flavor SU(3) analysis of D-meson decays including the leading order symmetry breaking effects. We find that SU(3) breaking can easily account for the recent LHCb measurement of the difference in CP asymmetries in the decays of $D^0$ into $K^+K^-$ and $\pi^+\pi^-$ mesons, once an enhancement mechanism, similar to the $\Delta=1/2$ rule in neutral kaon decays is assumed. As a byproduct of the analysis, one can make certain predictions regarding the individual assymetries in the above two, as well as the $D^0 \to \pi^0\pi^0$ decay channels.

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