Consistency of LEP event excesses with an h→aa decay scenario and low-fine-tuning next-to-minimal supersymmetric standard models

We examine the LEP limits for the Zh→Z+b’s final state and find that the excess of observed events for m_h∼100GeV correlates well with there being an m_h∼100GeV Higgs boson with SM-like ZZh coupling that decays partly via h→bb¯+τ⁺τ^- [with B(h→bb¯)∼0.08] but dominantly via h→aa [with B(h→aa)∼0.9], where m_a<2m_b so that a→τ⁺τ^- (or light quarks and gluons) decays are dominant. This type of scenario is precisely that predicted in the Next-to-Minimal Supersymmetric Model for parameter choices yielding the lowest possible fine-tuning.