Moderately suppressed dimension-five proton decay in a flipped SU(5) model

We study colored Higgsino-mediated proton decay (dimension-five decay) in a model based on the flipped $SU(5)$ GUT. In model, GUT-breaking ${\bf10}$, ${\bf \overline{10}}$ fields have GUT-scale mass term and gain VEVs through higher-dimensional operators, which induces an effective between color triplets 5}$, \bar{5}}$ Higgs that is not much smaller than GUT scale. This structure gives rise to observable dimension-five decay, at same time achieves moderate suppression softens tension with current bound $\Gamma(p\to K^+\nu)$. investigate flavor dependence of Wilson coefficients operators relevant by relating them diagonalized Yukawa couplings CKM matrix components MSSM, utilizing fact are one-to-one correspondence MSSM models. Then we numerically evaluate coefficients, predict distributions ratios partial widths various modes.