On dipenguin contribution to D⁰ - bar D⁰ mixing
classification
✦ hep-ph
hep-ex
keywords
dipenguinmixingcontributecontributiondiagramdistancefour-quarkimpact
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We study the impact of the four-quark dipenguin operator to the D^0 - \bar D^0 mixing. It is shown to contribute to the short distance piece at the same order of magnitude as the box diagram.
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