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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0802.3785hep-ph
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用探测器中微子附近的MINOS检验Lorentz和CPT不变性

Testing Lorentz and CPT Invariance with MINOS Near Detector Neutrinos

B. J. Rebel, S. L. Mufson

摘要:

我们提出了一个分析,旨在寻找洛伦兹和CPT违反所预测的SME框架使用带电的电流中微子事件在MINOS近探测器。特别是,我们开发的方法来确定的正规化的带电电流中微子事件的函数的恒星相位的周期性变化。为了测试这些方法,我们使用标准MINOS Monte Carlo模拟了一组1,000个没有洛伦兹和CPT违规信号的实验。我们对每个模拟实验进行FFT,以找到没有信号的恒星相图中的功率分布。然后,我们向恒星中微子振荡概率中注入一个强度不断增加的信号,直到我们发现FFT功率谱中的平均值偏离了5 $σ$。通过这种方法,我们可以建立上限的洛伦兹和CPT违反条款的SME。

英文摘要:

We present an analysis designed to search for Lorentz and CPT violations as predicted by the SME framework using the charged current neutrino events in the MINOS near detector. In particular we develop methods to identify periodic variations in the normalized number of charged current neutrino events as a function of sidereal phase. To test these methods, we simulated a set of 1,000 experiments without Lorentz and CPT violation signals using the standard MINOS Monte Carlo. We performed an FFT on each of the simulated experiments to find the distribution of powers in the sidereal phase diagram without a signal. We then injected a signal of increasing strength into the sidereal neutrino oscillation probability until we found a 5$σ$ deviation from the mean in the FFT power spectrum. By this method, we can establish upper limits for the Lorentz and CPT violating terms in the SME.

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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