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Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.
Phys Rev Lett. 2004 Mar 26;92(12):121801. doi: 10.1103/PhysRevLett.92.121801.
A search for the lepton-flavor-violating decay of the tau into three charged leptons has been performed using 91.5 fb(-1) of data collected at an e(+)e(-)center-of-mass energy around 10.58 GeV with the BABAR detector at the SLAC storage ring PEP-II. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations. Upper limits on the branching fractions are set in the range (1-3)x10(-7) at 90% confidence level.
利用在SLAC储存环PEP-II上的BABAR探测器，在质心能量约为10.58 GeV的正负电子对撞实验中收集的91.5 fb⁻¹数据，对τ轻子到三个带电轻子的轻子味违反衰变进行了搜索。在所考虑的所有六种衰变模式中，数据中发现的事件数与背景预期相符。在90%置信水平下，分支比的上限设定在(1 - 3)×10⁻⁷范围内。
