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arXiv 1306.1331hep-ph
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具有混合规范变换的非对易标准模型通过轻子味守恒$Z$衰变的束缚

Bound on Noncommutative Standard Model with Hybrid Gauge Transformation via Lepton Flavor Conserving $Z$ Decay

Weijian Wang, Jia-Hui Huang, Zheng-Mao Sheng

摘要:

基于非对易标准模型,采用混合规范变换,研究了$Z\rightarrow e^{+}e^{-}$衰变。结果表明,如果后者不包括在内,非交换修正的振幅的$Z\rightarrow e^{+}e^{-}$出现仅作为一个相位因子,因此,没有新的物理效应的衰减宽度。然而,当包含混合规范变换时,两体衰变过程中出现了非对易效应。实验分支比和标准模型预测之间的差异允许我们设定非对易参数的界限。

英文摘要:

The $Z\rightarrow e^{+}e^{-}$ decay is studied basing on the noncommutative standard model (NCSM) with the hybrid gauge transformation. It is shown that if the latter is not included, the noncommutative correction to the amplitude of the $Z\rightarrow e^{+}e^{-}$ appears only as a phase factor, so that there is no new physical effect on the decay width. However, when the hybrid gauge transformation is included, the noncommutative effect appears in the two-body decay process. The discrepancy between the experimental branch ratio and the standard model prediction allows us to set the bound on the noncommutative parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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