  We present a unique signal of jet-induced medium excitations: the enhancement
of baryon-to-meson ratios around the quenched jets.To illustrate this, we study
jet-particle correlations and the distributions of jet-induced identified
particles with respect to the jet direction in Pb+Pb collisions at the LHC via
a multi-phase transport model.We find a strong enhancement of baryon-to-meson
ratios for associated particles at intermediate transverse momentum around the
triggered jets in Pb+Pb collisions relative to p+p collisions, due to the
coalescence of jet-excited medium partons.Since the lost energy from jets can
diffuse to large angles, such baryon-to-meson-ratio enhancement is more
pronounced for larger relative distance from the jet axis.We argue that the
experimental confirmation of the enhancement of jet-induced baryon-to-meson
ratios around the jets will provide an unambiguous evidence for the medium
response to jet quenching in heavy-ion collisions.
