Constraints on the NMSSM from the Oblique Parameters

Figure 1

Oblique parameters 𝑆 and 𝑇 in the NMSSM in the constrained case with central parameters tan(𝛽)=5, 𝑀₀=𝑀_1/2=500 GeV, 𝐴₀=−800 GeV, 𝐴_𝜅=−100 GeV, sgn(𝜇)=+, and 𝜆=0.15 (first row of Table 1) with variation of the parameters successively in the ranges tan(𝛽)=5,10,…,40 (tan(𝛽)=5,10 lie very close together), 𝑀₀=250 GeV, 350 GeV,…,1950 GeV, 𝑀_1/2=150 GeV, 250 GeV,…,650 GeV as indicated in the figure. The shaded regions show the 1𝜎 and 2𝜎 error ellipses of the electroweak precision measurements fitted to 𝑆 and 𝑇 corresponding to (3) [6].