Fitting the annual modulation in DAMA with neutrons from muons and neutrinos.
Fitting the annual modulation in DAMA with neutrons from muons and neutrinos.
复制标题
用来自 μ 子和中微子的中子拟合 DAMA 中的年度调制。
DOI：
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复制
发表时间：
2014
影响因子：
8.6
通讯作者：
Jonathan H. Davis
中科院分区：
文献类型：
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作者：
Jonathan H. Davis
DAMA/LIBRA实验寻找暗物质从原子核散射的证据。来自DAMA的数据显示了9.2 σ的年度调制证据，与暗物质的横截面约为2 × 10（-40）cm（2）的情况一致。然而，这被其他直接检测实验排除。我们提出了一种以中子形式的年度调制的替代源，这些中子通过（8）B太阳中微子和大气μ子的组合从探测器周围的材料中释放出来。μ子调制的相位滞后于数据30天;然而，我们发现，添加调制中微子分量将组合信号的相位向前移动。此外，我们估计中微子和μ子需要1000 m（3）的散射材料才能产生足够的中子来构成信号。根据目前的数据，我们的模型与暗物质一样适合，我们讨论了未来实验的前景，以区分两者。
The DAMA/LIBRA experiment searches for evidence of dark matter scattering off nuclei. Data from DAMA show 9.2 σ evidence for an annual modulation, consistent with dark matter having a cross section around 2 × 10(-40) cm(2). However, this is excluded by other direct detection experiments. We propose an alternative source of annual modulation in the form of neutrons, which have been liberated from material surrounding the detector by a combination of (8)B solar neutrinos and atmospheric muons. The phase of the muon modulation lags 30 days behind the data; however, we show that adding the modulated neutrino component shifts the phase of the combined signal forward. In addition, we estimate that neutrinos and muons need ∼ 1000 m(3) of scattering material in order to generate enough neutrons to constitute the signal. With current data, our model gives as good a fit as dark matter, and we discuss prospects for future experiments to discriminate between the two.