Generation nonuniversality and precision electroweak measurements.
Generation nonuniversality and precision electroweak measurements.
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生成非通用性和精密弱电测量。
DOI：
10.1103/physrevd.46.r1905
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Ma
中科院分区：
文献类型：
--
作者：
Li;Ma
10年前提出的非普适性世代的规范模型预测，{tau}的寿命应该比标准模型中的更长。最近的{ital e}{sup +}{ital e{minus}}到{ital Z}的数据证实了这一点，尽管统计显著性只有2.3{sigma}。我们表明，该模型也与其他精密电弱测量一致，特别是它对{ital Z}峰测量的{rho}参数有{ital负贡献}。
A gauge model of generation nonuniversality proposed 10 years ago predicted that the {tau} lifetime should be longer than what it would be in the standard model. This has been confirmed by recent {ital e}{sup +}{ital e{minus}} to {ital Z} data, although the statistical significance is only 2.3{sigma}. We show that this model is also consistent with other precision electroweak measurements, and in particular it contributes {ital negatively} to the {rho} parameter measured at the {ital Z} peak.