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arXiv 1405.7645hep-phastro-ph.COhep-th
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从杂化到二次暴胀的高尺度超对称破缺

From Hybrid to Quadratic Inflation With High-Scale Supersymmetry Breaking

Constantinos Pallis, Qaisar Shafi

摘要:

受BICEP 2实验发现暴胀重力波的报道的启发,我们基于混合暴胀中使用的标准超势,提出了一种超重力下的暴胀方案。新模型产生的张量-标量比r ~ 0.14和标量谱指数ns ~ 0.964,对应于二次(混沌)膨胀。重要的新成分是规范单重态暴胀子场的高尺度(1.6-10)× 10^13 GeV的软超对称破缺质量和施加在凯勒势上的位移对称性。与早期的混合暴胀模型一样,暴胀的结束伴随着规范对称性在(1.2-7.1)× 10^16 GeV处的破缺,相当于大统一尺度。

英文摘要:

Motivated by the reported discovery of inflationary gravity waves by the BICEP2 experiment, we propose an inflationary scenario in supergravity, based on the standard superpotential used in hybrid inflation. The new model yields a tensor-to-scalar ratio r ~ 0.14 and scalar spectral index ns ~ 0.964, corresponding to quadratic (chaotic) inflation. The important new ingredients are the high-scale, (1.6-10) x 10^13 GeV, soft supersymmetry breaking mass for the gauge singlet inflaton field and a shift symmetry imposed on the Kähler potential. The end of inflation is accompanied, as in the earlier hybrid inflation models, by the breaking of a gauge symmetry at (1.2-7.1) x 10^16 GeV, comparable to the grand-unification scale.

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