Dynamical QCD Predictions for Ultrahigh Energy Neutrino Cross Sections

Details Dynamical QCD Predictions for Ultrahigh Energy Neutrino Cross Sections Dynamical QCD Predictions for Ultrahigh Energy Neutrino Cross Sections

1998-09-22

arxiv.org/abs/astro-ph/9809273v1

Astropart.Phys. 11 (1999) 327-334

Astronomy and Astrophysics

Astrophysics

16 pages, LaTeX, 4 figures, uses epsfig and amssymb style

Scientific paper

10.1016/S0927-6505(99)00006-7

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.

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