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arXiv 0803.0140hep-ph
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非临界弦宇宙学

Non-critical String Cosmologies

A. B. Lahanas

摘要:

非临界弦宇宙学是标准大爆炸宇宙学的替代。新的功能包含在依赖于非临界项的粒子内,以非常规的方式影响宇宙演化的动力学,与宇宙学数据一致。非临界性是导致在红移z=0.2时加速的后期过渡的原因。讨论了非耦合滚动反演在剩余丰度计算中的作用。在超对称理论中,非耦合的滚动重子将中性伴子残余密度稀释了十倍,大大放松了WMAP暗物质的严格约束,而与此同时,重子密度几乎不受影响,这与原始核合成一致。

英文摘要:

Non-critical String Cosmologies are offered as an alternative to Standard Big Bang Cosmology. The new features encompassed within the dilaton dependent non-critical terms affect the dynamics of the Universeś evolution in an unconventional manner being in agreement with the cosmological data. Non-criticality is responsible for a late transition to acceleration at redshifts z=0.2. The role of the uncoupled rolling dilaton to relic abundance calculations is discussed. The uncoupled rolling dilaton dilutes the neutralino relic densities in supersymmetric theories by factors of ten, relaxing considerably the severe WMAP Dark Matter constraints, while at the same time leaves almost unaffected the baryon density in agreement with primordial Nucleosynthesis.

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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