Chaotic motion of the c(c)over-bar system and a new mechanism of J/psi suppression

Based on random matrix theory and reduced BS equation, it is found that the regular motion of c (c) over bar system can be expected at a small value o f color screening mass but the chaotic motion at a large one. It is shown t hat the level mixing due to color screening serves as a new mechanism resul ting in J/psi suppression. Moreover, this kind of suppression can occur bef ore the color screening mass reaches its critical value for J/psi dissociat ion. In addition, it is implied that a strong J/psi suppression is possible in the absence of dissociation of J/psi.