Search for NMSSM Higgs bosons in the h->aa->mumu mumu, mumu tautau channels using ppbar collisions at sqrt{s}=1.96 TeV

Abstract

We report on a first search for production of the lightest neutral CP-even Higgs boson (h) in the next-to-minimal supersymmetric standard model, where h decays to a pair of neutral pseudoscalar Higgs bosons (a), using 4.2/fb of data recorded with the D0 detector at Fermilab. The a bosons are required to either both decay to mu^+mu^- or one to mu^+mu^- and the other to tau^+tau^-. No significant signal is observed, and we set limits on its production as functions of M_a and M_h.

Figures (3)

• Figure 1: The $\sqrt{m_2(\mu,{\text{track}})}$ vs. $\sqrt{m_1(\mu,{\text{track}})}$ distribution (a) in the multijet sample, and (b) after the isolation cut is applied to both muons for data and various MC signal masses.
• Figure 2: The dimuon invariant mass for events passing all selections in data, background, and 2$\mu$2$\tau$ signals for $M_a=3.6$, 4, 7, 10, and 19 GeV. $\sigma$($p\overline{p}$$\rightarrow$$h$+$X$)=1.9 pb is assumed, BR($h$$\rightarrow$$aa$)=1, and $M_h$=100 GeV.
• Figure 3: The expected and observed limits and $\pm$1 s.d. and $\pm$2 s.d. expected limit bands for $\sigma$($p\overline{p}$$\rightarrow$$h$+$X$)$\times$BR($h$$\rightarrow$$aa$), for (a) $M_h$=100 GeV and (b) $M_a$=4 GeV. The signal for BR($h$$\rightarrow$$aa$)=1 is shown by the solid line. The region $M_h$$<$86 GeV is excluded by LEP.