Cosmology with orthogonal nilpotent superfields
Cosmology with orthogonal nilpotent superfields
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正交幂零超场的宇宙学
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
J. Thaler
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文献类型：
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作者：
S. Ferrara;R. Kallosh;J. Thaler
研究了具有两个约束超多重态的超对称模型在暴胀宇宙学中的应用。第一个超场S是一个稳定手征超场，满足2次幂零性条件，S ^2 =0。第二个超场Phi是暴胀子手征超场，它可以组合成一个真实的超场B=（Phi-Phi*）/2 i。真实的超场B与S正交，S B=0，并且满足3次幂零性条件，B^3=0。我们表明，这些限制从频谱中删除复杂的标量sgoldstino，真实的标量暴胀子的合作伙伴（即“sinflaton”），和费米暴胀子。相应的超引力模型用德西特真空描述了一个引力子、一个大质量的引力子和一个真实的标量暴胀子，而在么正规范中没有戈尔茨坦和暴胀子。我们还讨论了松弛的超场约束，其中S^2=0和S Φ * 是手征的，这去除了sgoldstino和inflatino，但在光谱中留下了sinflaton。在这两个无暴胀模型中建立的宇宙学模型提供了一些优于现有结构的优势。
We study the application of a supersymmetric model with two constrained supermultiplets to inflationary cosmology. The first superfield S is a stabilizer chiral superfield satisfying a nilpotency condition of degree 2, S^2=0. The second superfield Phi is the inflaton chiral superfield, which can be combined into a real superfield B=(Phi-Phi*)/2i. The real superfield B is orthogonal to S, S B=0, and satisfies a nilpotency condition of degree 3, B^3=0. We show that these constraints remove from the spectrum the complex scalar sgoldstino, the real scalar inflaton partner (i.e. the "sinflaton"), and the fermionic inflatino. The corresponding supergravity model with de Sitter vacua describes a graviton, a massive gravitino, and one real scalar inflaton, with both the goldstino and inflatino being absent in unitary gauge. We also discuss relaxed superfield constraints where S^2=0 and S Phi* is chiral, which removes the sgoldstino and inflatino, but leaves the sinflaton in the spectrum. The cosmological model building in both of these inflatino-less models offers some advantages over existing constructions.