"Figure 6 Expected tanb=1.5" of "Search for heavy neutral Higgs bosons A and H in the $\mathrm{t\bar{t}}$Z channel in proton-proton collisions at 13 TeV"

Median expected (dashed lines) and observed (filled contours) 95% CL exclusion regions in the (mH, mA) parameter space of the type-II 2HDM for tan β = 0.5 (blue), 1 (orange), and 1.5 (red), derived assuming narrow resonances. The enclosed regions are excluded. The dotted lines indicate points of constant natural line width of the A boson relative to its mass in the 2HDM.

针对第二类二希格斯二重态模型（type-II 2HDM）的(mH, mA)参数空间，我们给出了在窄共振假设下推导得到的95%置信水平（CL）排除区域：其中中值预期结果以虚线表示，观测结果以填充等高线表示，且分别对应tanβ取0.5（蓝色）、1（橙色）与1.5（红色）三种参数取值。被该区域包围的参数空间均为已排除区域。此外，图中点虚线还标注了该模型中A玻色子相对于其质量的恒定自然线宽对应的参数点。