Mini-review of rare charmonium decays at BESIII

Details Mini-review of rare charmonium decays at BESIII Mini-review of rare charmonium decays at BESIII

2012-02-14

arxiv.org/abs/1202.2955v2

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, Submitted to Chinese Physics C. arXiv admin note: text overlap with arXiv:0710.0039 by other authors

Scientific paper

Recently, LHCb experiment announced a 3.5$\sigma$ evidence for direct CP violation in $D^0$ decay by looking at the difference between $A_{CP}(D^0\rightarrow K^+K^-)$ and $A_{CP}(D^0\rightarrow \pi^+\pi^-)$. This is the first evidence of CP violation in charm system, which may indicate new physics beyond the Standard Model. Motivated by this measurement, we review rare processes in charmonium decay, especially, the weak decay, $C$ or $P$ violated decay and lepton flavor violated decays. In case the new physics appears in charm sector, these rare decays of charmonium states will provide opportunity to search for significant contributions from physics beyond the Standard Model. With huge $J/\psi$ and $\psi(2S)$ samples in BESIII experiment, the rare decays may be feasible.

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