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arXiv 1703.04752hep-phhep-ex
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偏振测量中的旋转不变观测量

Rotation-invariant observables in polarization measurements

Yan-Qing Ma, Jian-Wei Qiu, Hong Zhang

摘要:

偏振测量为检验标准模型和寻找新的物理提供了一个详细的方法。大多数以前的研究依赖于预先选择的坐标,这模糊了结果的意义。在矢量玻色子衰变为费米子对的过程中,两个转动不变观测量的构造已被证明是一个巨大的成功。在这项工作中,我们证明了存在更多旋转不变的可观测量,并提供了在任意衰变过程中找到所有这些可观测量的通用方法。以自旋为1/2和自旋为1的粒子衰变过程为例,计算了所有转动不变观测量的显式表达式,这可以作为探测器接受性的稳健检验,并有助于实验数据的分析。

英文摘要:

Polarization measurements provide a detailed method to test the Standard Model and to search for new physics. Most previous studies depend on pre-selected coordinates, which blurs the significance of the results. The construction of two rotation-invariant observables in vector boson decay into a fermion pair has been proved to be a big success. In this work, we show that there are more rotation-invariant observables and provide a general recipe to find all of them in an arbitrary decay process. Taking spin-1/2 and spin-1 particle decay processes as examples, we calculate the explicit expressions of all rotation-invariant observables, which can serve as a robust test of the detector acceptance and help the analysis of experimental data.

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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