Dipenguin-like contributions to D0 - anti-D0 mixing

Details Dipenguin-like contributions to D0 - anti-D0 mixing Dipenguin-like contributions to D0 - anti-D0 mixing

1997-12-05

arxiv.org/abs/hep-ph/9712279v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure; to appear in the proceedings of HADRON'97, BNL, August 1997; preprint number is added

Scientific paper

10.1063/1.55989

We show that because of the milder GIM suppression, the four-quark dipenguin
operator contributes to the short distance piece of the D^0-\bar D^0 mixing
amplitude at the same order of magnitude as the box diagram. In addition, we
put an upper bound \Delta m_D^{LDR} \leq 5 \times \Delta m_D^{box} on a
long-distance resonant contribution induced by the penguin mixing.

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