标题： 动态QCD对超高能中微子截面的预测 显示英文标题

标题： Dynamical QCD Predictions for Ultrahigh Energy Neutrino Cross Sections

摘要： 中微子-核子总截面在中微子能量高达超高能（UHE），E_\nu=10 ^12 GeV，是在动态（辐射）部分子模型的框架内计算的。 这些预测的预期不确定性在最高能量处不超过约20%，此时部分子分布在尚未测量的区域x\simeq 10^-8到10^-9的贡献是不可忽略的。 这比由于为了计算UHE宇宙中微子事件率而对部分子分布进行x<10^-5的任意外推所估计的约2^+-1的不确定性要准确得多。 显示英文摘要

摘要： Neutrino-nucleon total cross sections for neutrino energies up to ultrahigh energies (UHE), E_\nu=10^12 GeV, are evaluated within the framework of the dynamical (radiative) parton model. The expected uncertainties of these predictions do not exceed the level of about 20 % at the highest energies where contributions of parton distributions in the yet unmeasured region around x\simeq 10^-8 to 10^-9 are non-negligible. This is far more accurate than estimated uncertainties of about 2^+-1 due to ad hoc extrapolations of parton distributions to x<10^-5 required for calculating UHE cosmic neutrino event rates.