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arXiv 1909.01548hep-ph
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在MOMENT中对$δ_\text{CP}$进行精密测量

Precision measurements on $δ_\text{CP}$ in MOMENT

Jian Tang, Sampsa Vihonen, Tse-Chun Wang

摘要:

由于在轻子区发现CP破坏是非常有希望的,因此对狄拉克CP相位$δ_\text{CP}$的精确测量将是未来中微子振荡实验的重点之一。在这项工作中,我们研究了拟议中的基线μ子衰变实验的物理范围。为了确定潜在的瓶颈和机会,以提高CP精度的MOMENT,我们调查的统计误差,系统的不确定性,μ子束极性的分数,并调整基线长度,以匹配第一或第二振荡最大值的精确测量的$δ_\text{CP}$的效果。我们还模拟了超束实验T2 K,NO $ν$ A,T2 HK,DUNE和T2 HKK,作为对MOMENT的对比和补充。为了达到$δ_\text{CP}$在12 $^\circ$或更好在1 $σ$置信水平的精度,我们发现将MOMENT、DUNE和T2 HK的数据结合起来就足够了。

英文摘要:

As it is very promising to expect a discovery of CP violation in the leptonic sector, the precision measurement of the Dirac CP phase $δ_\text{CP}$ is going to be one of the key interests in the future neutrino oscillation experiments. In this work, we examine the physics reach of the proposed medium baseline muon decay experiment MOMENT. In order to identify potential bottlenecks and opportunities to improve CP precision in MOMENT, we investigate the effect of statistical error, systematic uncertainties, fraction of the muon beam polarity, and adjusting the baseline length to match the first or second oscillation maximum on the precision measurement of $δ_\text{CP}$. We also simulate superbeam experiments T2K, NO$ν$A, T2HK, DUNE and T2HKK in comparison and complementary to MOMENT. To reach the precision of $δ_\text{CP}$ at 12$^\circ$ or better at 1$σ$ confidence level, we find it sufficient to combine the data of MOMENT, DUNE and T2HK.

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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