1207.1846 (Arghya Choudhury et al.)

New limits on top squark NLSP from LHC 4.7 $fb^{-1}$ data    [PDF]

Arghya Choudhury, Amitava Datta

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 ($\tilde t_1$) mass assuming that it is the next to lightest supersymmetric particle (NLSP). If the decay $\lstop \ra c \lspone$ dominates and the production of dark matter relic density is due to NLSP - LSP co-annihilation then the lower limit on $\mlstop$ is 240 GeV. The limit changes to 200 GeV if the decay $\lstop \ra b W \lspone$ dominates. Combining these results it follows that $\lstop$ NLSP induced baryogenesis is constrained more tightly.

View original: http://arxiv.org/abs/1207.1846