We show that in nonlocal generalization of standard nonsupersymmetric SU(5) GUT, it is possible to solve the problems with the proton lifetime and the Weinberg angle without introduction of additional particles in the spectrum of the theory. Nonlocal scale Λ responsible for ultraviolet cutoff coincides (up to some factor) with GUT scale MGUT. We find that in the simplest nonlocal modification of the SU(5) model, MGUT ≈ 3 ⋅ 1016GeV. In the general case, the value of MGUT is an arbitrary and the most interesting option MGUT = O(MPL) could be realized.

中文翻译：

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非本地 SU(5) GUT

我们表明，在标准非超对称 SU(5) GUT 的非局部推广中，可以解决质子寿命和温伯格角的问题，而无需在理论谱中引入额外的粒子。非局部尺度Λ导致紫外线截止的原因与 GUT 规模一致（在某些因素上）米肠道. 我们发现在 SU(5) 模型的最简单的非局部修改中，米肠道 ≈ 3 ⋅ 1016锗钒。在一般情况下，值米肠道是一个任意且最有趣的选项米肠道 = ○(米PL)可以实现。