Puzzles in Cabibbo-Suppressed Charm Decays

Details Puzzles in Cabibbo-Suppressed Charm Decays Puzzles in Cabibbo-Suppressed Charm Decays

2002-08-23

arxiv.org/abs/hep-ph/0208217v2

Phys.Lett. B551 (2003) 337-342

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, additional clarification at eq. (13), correction of error in eq. (18) and subsequent discussion

Scientific paper

10.1016/S0370-2693(02)03064-2

We identify two Cabibbo suppressed $D^+$ decay modes with anomalously high branching ratios which are not simply explained by any model. All standard model diagrams that can contribute to these decays are related by symmetries to diagrams for other decays that do not show any such enhancement. If these high branching ratios are confirmed by more precise experiments, they may require new physics to explain them. Anomalies in $D_s$ decays and tests for possible violation of G-parity are discussed.

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