(a), (b), (c) and (d) . True: the q ² obtained by true momentum of decayed parent particle to select the better solution, this result is upper threshold in this research; Rand: the q ² obtained by random strategy to select better solution; DNNC: q ² obtained by trained DNNC model to select the better solution; DNNR (LR): q ² obtained by the predicted momentum (P _pred) predicted by DNNR (LR) to select the better solution