Dipenguin-like contributions to D[sup 0]−D̄[sup 0] mixing
- 1 January 1998
- proceedings article
- Published by AIP Publishing in AIP Conference Proceedings
- Vol. 432 (1) , 852-855
- https://doi.org/10.1063/1.55989
Abstract
We show that because of the milder GIM suppression, the four-quark dipenguin operator contributes to the short distance piece of the D 0 −D̄ 0 mixing amplitude at the same order of magnitude as the box diagram. In addition, we put an upper bound Δm D LDR ⩽5m D box on a long-distance resonant contribution induced by the penguin mixing.Keywords
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