The \({\eta }_{c}(1S) {\to } PP^{\prime }\) decays are the parity violation modes. These decays can be induced by the weak interactions within the standard model, and have been searched for based on the available experimental data. To meet the needs of experimental investigation, the \({\eta }_{c}(1S) {\to } PP^{\prime }\) decays are studied with the perturbative QCD approach. It is found that branching ratios are the order of 10^− 15 and less, which offers a ready reference for future analyses.

中文翻译：

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ηc(1S)→ PP ′ $PP^{\prime }$ 衰减的研究

的\（{\ ETA} _ {C}（1S）{\到} PP ^ {\素} \）衰减是奇偶校验违反模式。这些衰减可以由标准模型内的弱相互作用引起，并且已经根据可用的实验数据进行了搜索。为了满足实验研究的需要，采用微扰 QCD 方法研究了\({\eta }_{c}(1S) {\to } PP^{\prime }\)衰变。发现支化率在 10 ^{- 15}或更低的数量级，这为以后的分析提供了现成的参考。