Figure 1

Allowed regions for $m_{H_2^{+}}$ vs $m_{H_1^{+}}$ from electroweak precision constraints on $\mathrm{\Delta }T$ at the $1\sigma$ [red (dark gray)] and $2\sigma$ [green (light gray)] confidence levels. For $\beta =\pi /4$, $m_{A_0}=475\mathrm{GeV}$, and $m_{H_0}=70\mathrm{GeV}$. The plus sign marks our benchmark point $(m_{H_2^{+}},m_{H_1^{+}})=(850,90)\hspace{0.17em}\hspace{0.17em}\text{GeV}$ (see body text for its full definition).