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arXiv 0708.4098hep-phastro-phhep-th
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对称性破缺的杂化曲率

Hybrid Curvatons from Broken Symmetry

Tomohiro Matsuda

摘要:

我们提出了一个新的一般机制产生的曲率扰动后,通货膨胀。我们的模型基于一个简单的假设,即暴胀后开始振荡的场具有以潜在的全局对称性为特征的势,该对称性轻微或严重地被破坏。由于对称性破缺的振荡,会发生不均匀的预热。与传统的曲率模型不同,我们将不把曲率与振荡场等同起来。曲率与预热场一致,预热场可以是标量场、矢量场或费米子场。我们引入一个明确的质量项的曲率,这是很重要的,以后的演变和衰变。我们目前的模型代表了最简单的例子,混合的曲率和不均匀的预热。

英文摘要:

We present a new general mechanism for generating curvature perturbations after inflation. Our model is based on the simple assumption that a field that starts to oscillate after inflation has a potential characterized by an underlying global symmetry that is slightly or badly broken. Inhomogeneous preheating occurs due to the oscillation with the broken symmetry. Unlike the traditional curvaton model, we will not identify the curvaton with the oscillating field. The curvaton is identified with the preheat field that could be either a scalar, vector, or fermionic field. We introduce an explicit mass term for the curvaton, which is important for later evolution and the decay. Our present model represents the simplest example of the hybrid of the curvatons and inhomogeneous preheating.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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