王者归来：无比例${\cal F}$ - $SU(5)$
The Return of the King: No-Scale ${\cal F}$-$SU(5)$
摘要：
我们重新审视了无标度${\cal F}$ - $SU(5)$中的可行参数空间，在LHC建立的普遍的胶子质量限制的背景下考察了大统一理论。满足无标度边界条件和实验测量的标准模型（SM）类希格斯玻色子质量要求模型空间中的胶子质量下限约为1.9 TeV，这可能不是巧合，是当前LHC超对称性搜索的界限。这为为什么迄今为止在LHC上没有观察到超对称信号提供了一个合理的解释。相反，由于超对称破缺软项$B_μ$必须在统一尺度下消失的严格条件，矢量类翻转粒子相对较重，因此我们也无法解决最近在13 TeV LHC上消失的750 GeV双光子共振。因此，无标度${\cal F}$ - $SU(5)$在虚假的750 GeV双光子过剩随风而去后作为国王返回。
英文摘要：
We revisit the viable parameter space in No-Scale ${\cal F}$-$SU(5)$, examining the Grand Unified Theory within the context of the prevailing gluino mass limits established by the LHC. The satisfaction of both the No-Scale boundary condition and the experimentally measured Standard Model (SM) like Higgs boson mass requires a lower limit on the gluino mass in the model space of about 1.9 TeV, which maybe not coincidentally is the current LHC supersymmetry search bound. This offers a plausible explanation as to why a supersymmetry signal has thus far not been observed at the LHC. On the contrary, since the vector-like flippon particles are relatively heavy due to the strict condition that the supersymmetry breaking soft term $B_μ$ must vanish at the unification scale, we also cannot address the recently vanished 750 GeV diphoton resonance at the 13 TeV LHC. Therefore, No-Scale ${\cal F}$-$SU(5)$ returns as a King after the spurious 750 GeV diphoton excess was gone with the wind.
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