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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1110.1900hep-ex
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用MINOS实验寻找非标准相互作用

Search for Non-standard Interactions with the MINOS Experiment

Zeynep Isvan

摘要:

MINOS利用两个探测器之间μ介子中微子的消失,在735公里的基线上搜索中微子振荡。我们最近报道了对大气中中微子振荡的最精确测量和对反中微子振荡的第一次标记测量。中微子质量分裂和混合角分别为$|Δm^{2}| = 2.32_{-0.08}^{+0.12} \times 10^{-3}\,eV^{2}$和$\sin^{2}2θ> 0.90$(90% C. L.)用于暴露$7.25 \times 10^{20}$靶上质子(PoT)。在NuMI反中微子运行模式下,在$1.7 \times 10^{20}$ PoT暴露下,反中微子振荡参数测量为$Δ\bar{m}^{2}=(3.36^{+0.46}_{-0.40}\textrm{(stat.)}\pm0.06\textrm{(syst.)})\times 10^{-3}\,eV^{2}$和$\sin^{2}(2\barθ)=0.86^{+0.11}_{-0.12}\textrm{(stat.)}\pm0.01\textrm{(syst.)}$。我们使用中微子和反中微子振荡参数的明显差异来约束非标准物质的相互作用,这可能会发生在传播过程中通过地壳的远探测器。

英文摘要:

MINOS searches for neutrino oscillations using the disappearance of muon neutrinos between two detectors, over a baseline of 735 km. We recently reported the most precise measurement of neutrino oscillations in the atmospheric sector and the first tagged measurement of antineutrino oscillations. The neutrino mass splitting and mixing angle are measured to be $|Δm^{2}| = 2.32_{-0.08}^{+0.12} \times 10^{-3}\,eV^{2}$ and $\sin^{2}2θ> 0.90$ (90% C.L.) for an exposure of $7.25 \times 10^{20}$ protons-on-target (PoT). Antineutrino oscillation parameters are measured as $Δ\bar{m}^{2}=(3.36^{+0.46}_{-0.40}\textrm{(stat.)}\pm0.06\textrm{(syst.)})\times 10^{-3}\,eV^{2}$ and $\sin^{2}(2\barθ)=0.86^{+0.11}_{-0.12}\textrm{(stat.)}\pm0.01\textrm{(syst.)}$ with an exposure of $1.7 \times 10^{20}$ PoT in NuMI antineutrino running mode. We use the apparent difference in neutrino and antineutrino oscillation parameters to constrain non-standard matter interactions which could occur during propagation through the Earth's crust to the far detector.

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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