Mini-review of rare charmonium decays at BESⅢ

  • Recently, the LHCb experiment announced 3.5σ evidence for direct CP violation in D0 decay by looking at the difference between ACP(D0→K+K-) and ACP(D0→π+π-). This is the rst evidence of CP violation in a 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 avor violated decays. In case the new physics appears in charm sector, these rare decays of charmonium states will provide an opportunity to search for signi cant contributions from physics beyond the Standard Model. With huge J/ψ and ψ(2S) samples in BES0 experiment, the rare decays may be feasible.
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LI Hai-Bo and ZHU Shi-Hai. Mini-review of rare charmonium decays at BESⅢ[J]. Chinese Physics C, 2012, 36(10): 932-940. doi: 10.1088/1674-1137/36/10/003
LI Hai-Bo and ZHU Shi-Hai. Mini-review of rare charmonium decays at BESⅢ[J]. Chinese Physics C, 2012, 36(10): 932-940.  doi: 10.1088/1674-1137/36/10/003 shu
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Received: 2012-01-13
Revised: 2012-02-14
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Mini-review of rare charmonium decays at BESⅢ

    Corresponding author: LI Hai-Bo,
    Corresponding author: ZHU Shi-Hai,

Abstract: Recently, the LHCb experiment announced 3.5σ evidence for direct CP violation in D0 decay by looking at the difference between ACP(D0→K+K-) and ACP(D0→π+π-). This is the rst evidence of CP violation in a 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 avor violated decays. In case the new physics appears in charm sector, these rare decays of charmonium states will provide an opportunity to search for signi cant contributions from physics beyond the Standard Model. With huge J/ψ and ψ(2S) samples in BES0 experiment, the rare decays may be feasible.

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