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Using the ATLAS 4.7 $fb^{-1}$ data on new physics search in the jets + $\met$channel, we obtain new limits on the lighter top squark ($\tilde t_1$)considering all its decay modes assuming that it is the next to lightestsupersymmetric particle (NLSP). If the decay $\lstop$ $\ra c \lspone$ dominatesand the production of dark matter relic density is due to NLSP - LSPco-annihilation then the lower limit on $\mlstop $ is 240 GeV. The limitchanges to 200 GeV if the decay $\lstop$ $\ra b W \lspone$ dominates. Combiningthese results it follows that $\lstop $ NLSP induced baryogenesis is nowconstrained more tightly.

New limits on top squark NLSP from ATLAS 4.7 $fb^{-1}$ data