Radiatively generated source of flavor universal scalar soft masses

We report that models of electroweak supersymmetry with gaugino mass unification and sequestered scalar masses can still produce viable spectra, as long as we include a set of nonstandard supersymmetry breaking terms, which are trilinear in scalars like the A-terms, but are nonholomorphic in visible sector fields unlike the A- terms. These terms impart a subtle feature to one loop renormalization group equations of soft supersymmetry breaking terms, indirectly sourcing flavor universal contributions to all scalar masses. These new contributions can even dominate over radiative corrections from bino, and help raise right handed sleptons above bino, while leaving a tell-tale signature in the spectrum.

Figure 1

Left panel: first generation slepton mass as a function of the input parameter $\sqrt{|{\xi }_t|}/y_t$ for different values of ${\mathrm{\Lambda }}_{\mathrm{int}}$ (black and dashed: $10^{11}\mathrm{GeV}$, blue and dotted: $10^9\mathrm{GeV}$, red and dash-dotted: $10^7\mathrm{GeV}$) with $M_1=0$. Right panel: The mass splitting between the first and third generation RH sleptons as a function of $\tan \beta$.

Figure 2

We show the contours of the first two generation slepton masses at ${\mu }_{\mathrm{IR}}$ (in GeV) in the $\mu –C_t$ plane fixed at the input scale. The allowed region requires $\mu$ and $C_t$ to have a relative sign in between them which consequently generates nontachyonic slepton masses at ${\mu }_{\mathrm{IR}}$.

Figure 3

The red shaded region satisfies the relic density $\mathrm{\Omega }{h}^2=0.11$ [47]. The upper and lower boundaries correspond to boundaries in $20\mathrm{GeV}\le ({\tilde{m}}_E-M_1)\le 500\mathrm{GeV}$. The blue shaded region refers to the condition where $T_F>T_R$.