$gammagamma + l + /slashed{E}_{T}$ signal of NMSSM at the LHC

摘要

In the next-to-minimal supersymmetric Standard Model (NMSSM), a pure singlet-like light pseudoscalar $(A_1)$ can dominantly decay to diphoton mode. In the charginoa€“neutralino associated production, followed by decays of heavier neutralinos to the lighter ones along with $A_1$ leads to a final-state $gammagamma + l + /slashed{E}_{T}$. In this talk, the enhancement mechanism of diphoton mode of $A_1$ and its detection possibility in the final-state $(gammagamma + l + /slashed{E}_{T})$ at the LHC run-2 are briefly summarized.