#NEUTRINO TELESCOPES FOR FREE#
#NEUTRINO TELESCOPES INSTALL#

Nuclear effects also alter the inelasticity distribution of neutrino interactions in water/ice by increasing the number of low-inelasticity interactions, with a larger effect for ν than ν¯. These modifications increase the cross sections by 1–2% at energies below 100 TeV (antishadowing) and reduce it by 3–4% at higher energies (shadowing). Because shadowing is larger for heavier nuclei, such as iron, found in the Earth's core, it introduces a zenith-angle dependent change in the absorption cross section. Both of these effects depend on the interaction medium. Here we consider modifications of high-energy neutrino interactions due to two nuclear effects: modifications of the parton densities in the nucleus, referred to here as shadowing, and the effect of nonisoscalar targets, with unequal numbers of neutrons and protons.

#NEUTRINO TELESCOPES FOR FREE#

Current studies of TeV neutrinos use cross sections which are calculated for free nucleons with targets which are assumed to contain equal numbers of protons and neutrons. These neutrinos are used to study high-energy neutrino interactions and to probe the Earth through absorption tomography. Neutrino telescopes like IceCube, KM3NeT, and Baikal-GVD offer physicists the opportunity to study neutrinos with energies far beyond the reach of terrestrial accelerators. With this paper we aim to support the consumers of these physics tunes by providing comprehensive summaries of our alternate model constructions, of the relevant datasets and their systematics, and of our tuning procedure and results. All tuned model configurations discussed in this paper are available through public releases of the GENIE Generator.

#NEUTRINO TELESCOPES INSTALL#

In this work we perform a careful investigation of the observed tensions between exclusive and inclusive data, and install analysis improvements to handle systematics in historic data. The same analysis was performed with several different comprehensive cross-section model sets available in GENIE Generator v3.

We summarize the results of a study performed within the GENIE global analysis framework, revisiting the GENIE bare-nucleon cross-section tuning and, in particular, the tuning of (a) the inclusive cross section, (b) the cross section of low-multiplicity inelastic channels (single-pion and double-pion production), and (c) the relative contributions of resonance and nonresonance processes to these final states.