  We derive a new formula for jet energy loss using finite endpoint momentum
shooting strings initial conditions in SYM plasmas to overcome the difficulties
of previous falling string holographic scenarios. We apply the new formula to
compute the nuclear modification factor RAA and the elliptic flow parameter v2
of light hadrons at RHIC and LHC. We show furthermore that Gauss-Bonnet
quadratic curvature corrections to the AdS5 geometry improve the agreement with
the recent data.
