Surviving scenario of stop decays for ATLAS $\ell +jets+E_T^{miss}$ search

Abstract

Recently ATLAS reported a $3.3\sigma$ excess in the stop search with $\ell +jets+E_T^{miss}$ channel. We try to interpret the signal by a light stop pair production in the MSSM. We find: (1) simple models where stop decays into a higgsino or a bino are not favored. (2) an extension of them can explain the data at $2\sigma$ level without conflicting with the other search channels. A surviving possibility includes a light stop and a light higgsino, which is expected in a natural SUSY scenario.

Comments: 6 pages, 7 figures