Abstract
An urbaryon picture having the two-step structure of the constructive forces is proposed. The very strong constructive force of the first kind works among the urbaryons q with large mass and charm charge. By the effect of urbaryon pairs qij in the non-charm state, the urbaryons behave as clusters Q whose effective masses are very light. The rather weak constructive force of the second kind distinguishes hadron states QQ, QQQ from exotic ones QQQQ, QQQQQ, etc., and plays an essential role in hadronic reactions. In the process with a large mome~tum transfer, the urbaryons Q are rearranged as if they were independent free particles. On the basis of this picture, it is shown that the factorizability of urbaryon rearrangement amplitude can be realized.
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