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首页> 外文期刊>The astronomical journal >An Algorithm for the Reconstruction of Neutrino-induced Showers in the ANTARES Neutrino Telescope
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An Algorithm for the Reconstruction of Neutrino-induced Showers in the ANTARES Neutrino Telescope

机译：在ANTARES中微子望远镜中重建中微子引起的阵雨的算法

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Muons created by charged current (CC) interactions in the water surrounding the ANTARES neutrino telescope have been almost exclusively used so far in searches for cosmic neutrino sources. Due to their long range, highly energetic muons inducing Cherenkov radiation in the water are reconstructed with dedicated algorithms that allow for the determination of the parent neutrino direction with a median angular resolution of about 04 for an neutrino spectrum. In this paper, an algorithm optimized for accurate reconstruction of energy and direction of shower events in the ANTARES detector is presented. Hadronic showers of electrically charged particles are produced by the disintegration of the nucleus both in CC and neutral current interactions of neutrinos in water. In addition, electromagnetic showers result from the CC interactions of electron neutrinos while the decay of a tau lepton produced in CC interactions will, in most cases, lead to either a hadronic or an electromagnetic shower. A shower can be approximated as a point source of photons. With the presented method, the shower position is reconstructed with a precision of about 1 m; the neutrino direction is reconstructed with a median angular resolution between 2° and 3° in the energy range of 1–1000 TeV. In this energy interval, the uncertainty on the reconstructed neutrino energy is about 5%–10%. The increase in the detector sensitivity due to the use of additional information from shower events in the searches for a cosmic neutrino flux is also presented.
机译：迄今为止，ANTARES中微子望远镜周围水中的带电电流（CC）相互作用产生的μ子几乎仅用于搜索宇宙中微子源。由于它们的射程远，所以使用专用算法对水中诱导高切伦科夫辐射的高能介子进行了重建，这些算法可以确定中微子谱的中微子方向，其中位角分辨率约为04。本文提出了一种优化算法，可在ANTARES检测器中准确重建能量和阵雨方向。带电粒子的强子阵雨是通过原子核在CC中的分解以及水中中微子的中性电流相互作用而产生的。此外，电磁辐射是由电子中微子的CC相互作用引起的，而在CC相互作用中产生的tau轻子的衰变在大多数情况下将导致强子或电磁辐射。可以将阵雨近似为光子的点源。利用所提出的方法，淋浴位置被重建为大约1m的精度;在1–1000 TeV能量范围内，以2°至3°之间的中值角分辨率重构中微子方向。在此能量区间中，重构的中微子能量的不确定性约为5％–10％。还提出了由于在寻找宇宙中微子通量的过程中使用了来自淋浴事件的其他信息，从而提高了探测器的灵敏度。

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