Search for the lepton flavor violating decay J/psi->emu
Search for the lepton flavor violating decay J/psi->emu
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寻找违反衰变的轻子味 Jpsi->e mu
DOI：
10.1007/s11433-022-1995-0
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Z. Y. You
中科院分区：
文献类型：
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作者：
BESIII Collaboration;Z. Y. You
利用BEPCIIe+e−储存环上BESIII探测器收集到的8.998 × 109 J/μ π事例，研究了轻子味破坏衰变J/μ π →e±μ π.没有观察到超过背景的信号;因此，我们在90%置信水平下设定了分支分数的上限。将先前的最佳结果提高了30倍以上，这一测量对重夸克偶素扇区中的轻子味破坏提出了迄今为止最严格的限制。
We present a search for the lepton flavor violating decayJ/ψ→e±μ∓using 8.998 × 109J/ψevents collected with the BESIII detector at the BEPCIIe+e−storage ring. No excess of signal above background is observed; we therefore set an upper limit on the branching fraction ofat the 90% confidence level. Improving the previous best result by a factor of more than 30, this measurement places the most stringent limit to date on lepton flavor violation in the heavy quarkonium sector.