Diffuse flux of muon neutrinos predicted for GRBs, associated to their prompt emission in the case of Γ = 100 (top panels) and Γ = 300 (bottom panels) for ξ_esc = 0.25 and ξ_esc = 0.1 in the left and right panels, respectively. The contribution from the acceleration zone is marked in red and the one from the cooling zone in blue. The reference Waxman-Bahcall flux is also shown for comparison.