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arXiv 0811.4457hep-phastro-phgr-qchep-th
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MSSM平坦方向衰减中熵模增长的研究:参数空间的约束

Study of the Growth of Entropy Modes in MSSM Flat Directions Decay: Constraints on the Parameter Space

Francis-Yan Cyr-Racine, Robert H. Brandenberger

摘要:

我们研究了最小超对称标准模型(MSSM)中模场的共振衰减如何影响早期宇宙中的大尺度曲率扰动。一段时间以来,人们已经知道,在多组分系统中熵扰动的存在可以作为所有尺度上曲率扰动的种子。如果其中一个模量通过随机共振衰减,则这些熵扰动可以指数放大,从而影响该过程中的曲率功率谱。通过对这个功率谱进行COBE归一化,人们可以对底层粒子物理模型的质量和耦合进行约束,而不必依赖于对撞机实验。我们详细讨论了MSSM的情况下,但这种方法可以适用于其他理论以外的标准模型。

英文摘要:

We study how the resonant decay of moduli fields arising in the Minimal Supersymmetric Standard Model (MSSM) could affect large scale curvature perturbations in the early universe. It has been known for some time that the presence of entropy perturbations in a multi-component system can act as seeds for the curvature perturbations on all scales. These entropy perturbations could be amplified exponentially if one of the moduli decays via stochastic resonance, affecting the curvature power spectrum in the process. By imposing the COBE normalization on this power spectrum, one could put constraints on the masses and couplings of the underlying particle physics model without having to rely on collider experiments. We discuss in detail the case of the MSSM but this method could be applied to other theories beyond the Standard Model.

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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