Inflation in supersymmetric unified theories
Inflation in supersymmetric unified theories
复制标题
超对称统一理论中的暴胀
DOI：
10.1103/physrevd.56.6205
复制
发表时间：
1997
影响因子：
5
通讯作者：
R. Jeannerot
中科院分区：
文献类型：
--
作者：
R. Jeannerot
我们构建超对称统一模型，这会自动导致一段通货膨胀时期。这些模型均涉及不属于 MSSM 的 U(1) 对称性。我们考虑三种不同类型的模型，具体取决于这个额外的 U(1) 是否是非阿贝尔规范群的子群、属于可见扇区的 U(1) 因子还是属于隐藏扇区的 U(1) 因子。根据统一理论的结构、自发对称破缺模式以及是否具有全局超对称性或局部超对称性，暴胀可能是由 F 项或 D 项的非零真空期望值驱动的。在这两种情况下，宇宙弦都是在暴胀结束时形成的，并且它们在每个模型中都有不同的属性。暴胀和宇宙弦都会导致 CMBR 温度各向异性。我们表明，字符串对 C{sub l}{close_quote} 的贡献高达 75{percent} 的水平。因此，弦对 CMBR 和早期宇宙中导致结构形成的密度扰动的贡献不能被忽视。我们还讨论了一类非常有趣的模型，其中涉及 U(1){sub B{minus}L} 规范对称性。 {copyright} {ital 1997}更多 » {ital 美国物理学会}« 更少
We construct supersymmetric unified models which automatically lead to a period of inflation. The models all involve a U(1) symmetry which does not belong to the MSSM. We consider three different types of models depending on whether this extra U(1) is the subgroup of a non-Abelian gauge group, is a U(1) factor belonging to the visible sector or is a U(1) factor belonging to the hidden sector. Depending on the structure of the unified theory, on the spontaneous symmetry-breaking pattern and on whether we have global or local supersymmetry, inflation may be driven by the nonvanishing vacuum expectation value of an F term or by that of a D term. In both scenarios cosmic strings form at the end of inflation, and they have different properties in each model. Both inflation and cosmic strings contribute to the CMBR temperature anisotropies. We show that the strings contribute to the C{sub l}{close_quote}s up to the level of 75{percent}. Hence the contribution from strings to the CMBR and to the density perturbations in the early Universe which lead to structure formation cannot be neglected. We also discuss a very interesting class of models which involve a U(1){sub B{minus}L} gauge symmetry. {copyright} {ital 1997}more » {ital The American Physical Society}« less