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Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.
Phys Rev Lett. 2006 Feb 3;96(4):041801. doi: 10.1103/PhysRevLett.96.041801. Epub 2006 Feb 2.
A search for the nonconservation of lepton flavor in the decay tau+/--->e+/-gamma has been performed with 2.07x10(8) e+e--->tau+tau- events collected by the BABAR detector at the SLAC PEP II storage ring at a center-of-mass energy near 10.58 GeV. We find no evidence for a signal and set an upper limit on the branching ratio of Beta(tau+/--->e+/-gamma)<1.1x10(-7) at 90% confidence level.
利用SLAC PEP II储存环上的BABAR探测器在质心能量接近10.58 GeV时收集的2.07×10⁸个e⁺e⁻→τ⁺τ⁻事例，对τ⁺/⁻→e⁺/⁻γ衰变中轻子味不守恒进行了搜索。我们没有发现信号证据，并在90%置信水平下对分支比β(τ⁺/⁻→e⁺/⁻γ)设定了上限β(τ⁺/⁻→e⁺/⁻γ)<1.1×10⁻⁷。
