Abstract
In the collapsar scenario of the long duration Gamma-Ray Bursts(GRBs), multi-TeV neutrino emission is predicted as the jet makes its waythrough the stellar envelope. Such a neutrino signalis also expected for more general “failed” GRBs in which aputative jet is “choked” by a heavy envelope.If the neutrino oscillation parameters are in the atmospheric neutrinooscillation range, we show that the resonant oscillation ofelectron neutrino to muon/ natu neutrino can take place within the innerhigh density region of the choked jet progenitor with a heavy envelope,altering the neutrino flavor ratio on itssurface to $Phi^s_{u_e}:Phi^s_{u_mu}:Phi^s_{u_ au}=5:11:2$.Considering vacuum oscillation of these neutrinos on their way toEarth, the final flavor ratio detected on Earth is further modifiedto either :1.095:1.095$ for thelarge mixing angle solution to the solar neutrino data, or 1:1.3:1.3 formaximal mixing among the muon and tau neutrinos in vacuum.
