Prompt [Formula presented] fluxes in present and future [Formula presented] neutrino experiments

We use a nonperturbative QCD approach, the quark-gluon string model, to compute the [Formula presented]-neutrino fluxes produced by fixed target [Formula presented] collisions (where [Formula presented] is a target material) for incident protons of energies ranging from 120 to 800 GeV. The purpose of this calculation is to estimate in a consistent way the prompt background for the [Formula presented] oscillation search in the on-going [Formula presented] oscillation search experiments CHORUS and NOMAD, as well as the expected prompt background in future experiments, such as COSMOS at Fermilab and a possible second-generation [Formula presented] search experiment at the CERN SPS. In addition, we compute the number of [Formula presented] interactions expected by the experiment E872 at Fermilab.