$D^0 - \bar D^0$ Mixing in the Presence of Isosinglet Quarks

Details $D^0 - \bar D^0$ Mixing in the Presence of Isosinglet Quarks $D^0 - \bar D^0$ Mixing in the Presence of Isosinglet Quarks

1995-01-20

arxiv.org/abs/hep-ph/9501347v1

Phys.Rev.D52:4217-4222,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages plus four figures. The figures are not included but are available upon request

Scientific paper

10.1103/PhysRevD.52.4217

We analyse $\Delta C=2$ transitions in the framework of a minimal extension of the Standard Model where either a $Q=2/3$ or a $Q=-1/3$ isosinglet quark is added to the standard quark spectrum. In the case of a $Q=2/3$ isosinglet quark, it is shown that there is a significant region of parameter space where $D^0 - \bar D^0$ mixing is sufficiently enhanced to be observed at the next round of experiments. On the contrary, in the case of a $Q=-1/3$ isosinglet quark, it is pointed out that obtaining a substancial enhancement of $D^0 - \bar D^0$ mixing, while complying with the experimental constraints on rare kaon decays, requires a contrived choice of parameters.

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