摘要
We point out another important production channel of a light pseudoscalar Higgs boson a <sub>1</sub> via the decays of neutralinos, including over(χ, ̃) <sub>2, 3</sub> <sup>0</sup> → over(χ, ̃) <sub>1</sub> <sup>0</sup> a <sub>1</sub> , in the framework of the NMSSM. We scan the whole parameter space using the most up-to-date version of NMHDECAY and search for regions where B (over(χ, ̃) <sub>2, 3</sub> <sup>0</sup> → over(χ, ̃) <sub>1</sub> <sup>0</sup> a <sub>1</sub> ) > 0.5. If the gluino and squarks are light enough for copious production of SUSY events at the LHC, there would be numerous number of over(χ, ̃) <sub>2, 3</sub> <sup>0</sup> in subsequent decays of gluinos and squarks. Therefore, the production rates of a <sub>1</sub> via neutralino decays would be more important than h → a <sub>1</sub> a <sub>1</sub> and others. Potentially, the final state is filled with many τ leptons, which may be reconstructed at the mass of a <sub>1</sub> . However, it suffers from large backgrounds and poor efficiencies. © 2009 Elsevier B.V. All rights reserved.