Search for high energy neutrino induced cascades with the AMANDA-B10 detector
Search for high energy neutrino induced cascades with the AMANDA-B10 detector
复制标题
使用 AMANDA-B10 探测器搜索高能中微子诱发级联
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
I. Jose
中科院分区：
文献类型：
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作者：
Toboada Fermin;I. Jose
用Amanda - b10探测器寻找高能中微子引起的级联：南极μ子和中微子探测器阵列Amanda是部署在南极冰盖深处的切伦科夫探测器。带电粒子在冰中以比光速更快的速度运动，产生切伦科夫辐射，这种辐射可以被光电倍增管探测到。利用光倍增管所获得的信息，可以重建物体的物理特性，如方向和能量。所有类型的高能中微子在与物质相互作用时都能产生粒子级联。在冰中，瀑布通常只有几米长，比阿曼达的尺寸小得多。电子中微子通过带电电流和中性电流相互作用产生级联。μ子和τ中微子通过中性电流相互作用产生级联。孤立的级联也是由tau中微子通过带电电流相互作用产生的，因为产生的能量低于几百TeV的tau只会在衰变前传播几米。与中微子诱导的μ子相比，级联通道的优点是能量分辨率更好，在寻找地外中微子时大气中微子的背景低一个数量级。1997年收集的数据被用来寻找高能中微子引起的级联。共记录1.18 × 10次事件，有效生存时间为130.1 d。记录到的绝大多数事件都是由下行的宇宙射线诱导的介子产生的。明亮的介子能量损失是主要的背景
SEARCH FOR HIGH ENERGY NEUTRINO INDUCED CASCADES WITH THE AMANDA-B10 DETECTOR Ignacio José Taboada Fermı́n Douglas F. Cowen The Antarctic Muon And Neutrino Detector Array, Amanda, is a Cherenkov detector deployed deep in the ice cap at the South Pole. Charged particles traveling faster than the speed of light in ice produce Cherenkov radiation that is detected by Photo-Multiplier Tubes. Using the information obtained by the Photo-Multiplier Tubes, the physical characteristics, such as direction and energy, can be reconstructed. High energy neutrinos of all flavors can produce particle cascades when interacting with matter. In ice, cascades are typically a few meters long, much smaller than the dimensions of Amanda. Electron neutrinos produce cascades via both the charged and neutral current interactions. Muon and tau neutrinos produce cascades via the neutral current interaction. Isolated cascades are also produced by tau neutrinos via charged current interactions, because the resulting tau, at energies below a few hundred TeV, will travel only a few meters before decaying. Advantages of the cascade channel, compared to neutrino induced muons are better energy resolution and an order of magnitude lower background from atmospheric neutrinos when searching for extra-terrestrial neutrinos. Data collected in 1997 were searched for high energy neutrino induced cascades. A total of 1.18 × 10 events were recorded for an effective live-time of 130.1 days. The overwhelming majority of the events recorded were produced by down-going cosmic-ray induced muons. Bright muon energy losses are the main background when