标题： 在LEP的正负电子湮灭中寻找重同位旋单态中微子 显示英文标题

标题： Search for Heavy Isosinglet Neutrino in e+e- Annihilation at LEP

摘要： 我们报告了一种寻找第一代重中微子的研究，该中微子在标准的SU(2)_L规范群下为同位旋单态。 使用在130 GeV到208 GeV质心能量范围内L3探测器收集的数据。研究了N_e --> eW衰变道，并未发现质量在80 GeV到205 GeV范围内的重中微子N_e存在的证据。 推导出了重中微子和轻中微子之间混合参数的上限。 显示英文摘要

摘要： We report on a search for the first generation heavy neutrino that is an isosinglet under the standard SU(2)_L gauge group. The data collected with the L3 detector at center-of-mass energies between 130 GeV and 208 GeV are used.The decay channel N_e --> eW is investigated and no evidence is found for a heavy neutrino, N_e, in a mass range between 80 GeV and 205 GeV. Upper limits on the mixing parameter between the heavy and light neutrino are derived.