Determination of the Atmospheric Neutrino Flux and Searches for New Physics with AMANDA-II
Determination of the Atmospheric Neutrino Flux and Searches for New Physics with AMANDA-II
复制标题
DOI：
10.1103/physrevd.79.102005
复制
发表时间：
2009-02
影响因子：
8.6
通讯作者：
The IceCube Collaboration
中科院分区：
文献类型：
--
作者：
The IceCube Collaboration
AMANDA-II 探测器自 2000 年起在地理南极的深冰中运行，已积累了大量 100 GeV 至 10 TeV 能量范围的大气 μ 中微子样本。这些事件的天顶角和能量分布可用于搜索中微子扇区中量子引力的各种唯象特征，例如违反洛伦兹不变性（VLI）或量子退相干（QD）。通过分析 2000 年至 2006 年 1387 天的生命周期中收集的 5511 个候选中微子事件，我们没有发现此类影响的证据，并使用最大似然法设置了 VLI 和 QD 参数的上限。鉴于缺乏新的改变风味的物理证据，我们使用相同的方法来确定 100 GeV 以上的常规大气 μ 中微子通量。
The AMANDA-II detector, operating since 2000 in the deep ice at the geographic South Pole, has accumulated a large sample of atmospheric muon neutrinos in the 100 GeV to 10 TeV energy range. The zenith angle and energy distribution of these events can be used to search for various phenomenological signatures of quantum gravity in the neutrino sector, such as violation of Lorentz invariance (VLI) or quantum decoherence (QD). Analyzing a set of 5511 candidate neutrino events collected during 1387 days of livetime from 2000 to 2006, we find no evidence for such effects and set upper limits on VLI and QD parameters using a maximum likelihood method. Given the absence of evidence for new flavor-changing physics, we use the same methodology to determine the conventional atmospheric muon neutrino flux above 100 GeV.