In this paper we introduce a new kind of nuclear/hadronic coherent particle
production mechanism in high-energy collisions called \emph{dual coherent
particle emission (DCPE)} which takes place when the phase velocities of the
emitted particle v_{Mph} and that of particle source v_{B_1ph} satisfy the dual
coherence condition: v_{Mph} <= v_{B_1ph}^-1. The general signatures of the
DCPE in the nuclear and hadronic media are established and some experimental
evidences are given.Comment: 5 pages, 5 eps figs., revtex4 styl