We study the cosmology of a string derived supersymmetric flipped SU(5) model in the context of free-fermionic heterotic constructions that allow full calculability of the effective supergravity in perturbation theory around the fermionic vacuum where all string moduli have fixed values. The model has 3 generations of chiral families and a Higgs sector leading to particle phenomenology consistent with low energy data, that has been extensively studied in the past. Here, we show that it can also accommodate a novel successful cosmology, based on the no-scale effective supergravity derived from string theory as well as an appropriate induced superpotential suppressed by five powers of the string scale. It utilises two gauge singlet chiral superfields present in the low energy spectrum: the inflaton y, identified as the superpartner of a state mixed with R-handed neutrinos, and the goldstino z with a superpotential of the form W_I=M_Iz(y-λ y²) (in supergravity units) where λ is a dimensionless O(1) parameter and M_I the mass scale of inflation generated at 5th order by the breaking of an anomalous U(1)_A gauge symmetry, characteristic of heterotic string chiral vacua. The resulting scalar potential leads to Starobinsky type inflation. Our results can be easily generalised to a large class of models with similar properties.

我们在自由费米子杂散结构的背景下研究了一个字符串派生的超对称翻转SU（5）模型的宇宙论，该结构允许在所有字符串模量均具有固定值的费米离子真空周围的扰动理论中有效超重力的完整可计算性。该模型具有3代手征族和一个希格斯区，导致了与低能数据一致的粒子现象学，在过去已经进行了广泛的研究。在这里，我们表明，它还可以适应新的成功宇宙论，它基于从弦理论推导出的无尺度有效超重力，以及由弦尺度的五次幂所抑制的适当的感应超电势。它利用了低能谱中存在的两个轨距单重手性超场：充气y，_我= M _Iz的（Y-λÿ ²）（在超引力单位）其中λ是一个无量纲的O（1）参数和M_我通过异常U（1）的断裂在第五顺序产生通货膨胀的大规模_甲规对称性，杂合性字符串手性真空的特征。产生的标量势会导致Star​​obinsky型膨胀。我们的结果可以很容易地推广到具有相似属性的一大类模型中。