New constraints on a light CP-odd Higgs boson and related NMSSM ideal Higgs scenarios

Recent BABAR limits on BR(Υ(3S)→γa→γτ+τ-) and BR(Υ(3S)→γa→γμ+μ-) provide increased constraints on the abb coupling of a CP-odd Higgs boson, a, with ma7.5 GeV scenarios, which are theoretically the most favored, survive. We also outline the impact of the new ALEPH LEP results in the e+e-→Z+4τ channel. For tanβ≥3, only NMSSM ideal Higgs scenarios with mh1 > or approx. 98 GeV and ma1 close to 2mB satisfy the ALEPH limits. For tanβ < or approx. 2, the ALEPH limits are easily satisfied for the most theoretically preferred NMSSM scenarios, which are those with ma1 close to 2mB and mh1∼90-100 GeV.