Charged current neutrino cross section and tau energy loss at ultrahigh energies

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.013001· OSTI ID:21035675

Armesto, N; Merino, C; Parente, G; Zas, E ^[1]

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1. Departamento de Fisica de Particulas and Instituto Galego de Fisica de Altas Enerxias, Universidade de Santiago de Compostela, 15706, Santiago de Compostela (Spain)

We evaluate both the tau-lepton energy loss produced by photonuclear interactions and the neutrino charged current cross section at ultrahigh energies, relevant to neutrino bounds with Earth-skimming tau neutrinos, using different theoretical and phenomenological models for nucleon and nucleus structure functions. The theoretical uncertainty is estimated by taking different extrapolations of the structure function F{sub 2} to very low values of x, in the low and moderate Q{sup 2} range for the tau-lepton interaction and at high Q{sup 2} for the neutrino-nucleus inelastic cross section. It is at these extremely low values of x where nuclear shadowing and parton saturation effects are unknown and could be stronger than usually considered. For tau and neutrino energies E=10{sup 9} GeV we find uncertainties of a factor 4 for the tau energy loss and of a factor 2 for the charged current neutrino-nucleus cross section.

• OSTI ID: 21035675
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARGED CURRENTS
CROSS SECTIONS
ENERGY LOSSES
FOUR MOMENTUM TRANSFER
GEV RANGE
NEUTRINO REACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PHOTONUCLEAR REACTIONS
STRUCTURE FUNCTIONS
TAU NEUTRINOS
TAU PARTICLES