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arXiv 0905.2253astro-ph.HE
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22弦IceCube探测器的首次中微子点源结果

First Neutrino Point-Source Results From the 22-String IceCube Detector

IceCube Collaboration, R. Abbasi

摘要:

我们提出了在北方天空中的中微子点源搜索的新结果,使用2007-08年记录的数据与22串冰立方探测器(约四分之一的计划总数)和275.7天的寿命。最终的5114个中微子候选事件的样本与预期的大气μ子中微子和大气μ子的一小部分的背景相一致。没有发现点源的证据,在考虑所有试验后,天空中2.2 σ的事件最显着过量。在北半球天空中,具有E^-2谱的μ介子-中微子点源的平均上限为E^2 Phi_nu_mu < 1.4x10^-11 TeV cm^-2 s^-1,能量范围为3 TeV ~ 3 PeV,比之前AMANDA-II探测器的最佳平均上限提高了两倍。

英文摘要:

We present new results of searches for neutrino point sources in the northern sky, using data recorded in 2007-08 with 22 strings of the IceCube detector (approximately one-fourth of the planned total) and 275.7 days of livetime. The final sample of 5114 neutrino candidate events agrees well with the expected background of atmospheric muon neutrinos and a small component of atmospheric muons. No evidence of a point source is found, with the most significant excess of events in the sky at 2.2 sigma after accounting for all trials. The average upper limit over the northern sky for point sources of muon-neutrinos with E^-2 spectrum is E^2 Phi_nu_mu < 1.4x10^-11 TeV cm^-2 s^-1, in the energy range from 3 TeV to 3 PeV, improving the previous best average upper limit by the AMANDA-II detector by a factor of two.

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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