Measurement of the multi-TeV neutrino cross section with IceCube using Earth absorption
Measurement of the multi-TeV neutrino cross section with IceCube using Earth absorption
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DOI：
10.22323/1.358.0990
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发表时间：
2019-07
期刊：
影响因子：
--
通讯作者：
S. Robertson
中科院分区：
文献类型：
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作者：
S. Robertson
冰立方探测到的中微子能量比粒子加速器产生的任何中微子都高几个数量级。中微子是弱相互作用的粒子，但在能量超过30 TeV时，地球对中微子变得不透明。中微子的横截面在标准模型中得到了很好的预测。横截面的任何意外增加都可能是超出标准模型物理学的标志。在这个分析中，冰立方的μ介子中微子通量被用来拟合中微子相互作用的横截面，穿过地球的高能中微子将被吸收，最大似然拟合允许横截面被确定为标准模型预测的倍数。我们将使用一年的IceCube数据来回顾中微子截面的测量，其中包含10，000个事件，这些事件与标准模型的预测一致。在这篇文章中，我们提出了使用8年IceCube数据（约300，000个事件）扩展此分析的计划。在扩展的截面将测量每个中微子能量的带电和中性电流的相互作用。这将是目前最精确的高能μ子中微子截面测量，同时对任何超出标准模型的成分也很敏感。
IceCube detects neutrinos at energies orders of magnitude higher than any neutrinos produced at particle accelerators. Neutrinos are weakly interacting particles but at energies above 30 TeV the Earth becomes opaque to neutrinos. The neutrino cross section is well predicted in the Standard Model. Any unexpected increase in the cross-section could be a sign of beyond the standard model physics. In this analysis IceCube's through-going muon neutrino flux is used to fit for the cross section of neutrino interaction, the through-going high energy neutrinos will be absorbed as they travel through the Earth and a maximum likelihood fit allows for the cross section to be determined as a multiple of the Standard Model prediction. We will review the measurement of the neutrino cross section using 1 year of IceCube data, containing 10,000 events, which was found to be consistent with Standard Model predictions. In this contribution, we present plans for an extension to this analysis using 8 years of IceCube data, approximately 300,000 events. In the extension the cross section will be measure per neutrino energy for both charged and neutral current interactions. This will be the most accurate high-energy muon neutrino cross section measurement available, while also being sensitive to any beyond the Standard Model components.