Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
复制标题
皮埃尔俄歇天文台表面探测器对超高能 tau 中微子扩散通量的限制
DOI:
10.1103/physrevd.79.102001
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发表时间:
2009
影响因子:
5
通讯作者:
Abraham J
中科院分区:
文献类型:
--
作者:
Abraham J
Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimmingmay interact in the Earth’s crust and produce alepton by means of charged-current interactions. Thelepton may emerge from the Earth and decay in the atmosphere to produce a nearly horizontal shower with a typical signature, a persistent electromagnetic component even at very large atmospheric depths. The search procedure to select events induced bydecays against the background of normal showers induced by cosmic rays is described. The method used to compute the exposure for a detector continuously growing with time is detailed. Systematic uncertainties in the exposure from the detector, the analysis, and the involved physics are discussed. Noneutrino candidates have been found. For neutrinos in the energy range, assuming a diffuse spectrum of the form, data collected between 1 January 2004 and 30 April 2008 yield a 90% confidence-level upper limit of Eν2dNντ/dEν<9×10-8 GeV cm-2 s-1 sr-1.
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作者:
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DOI:
--
发表时间:
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期刊:
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