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A Vacuum Decaying Cosmological Model

机译:真空衰变宇宙学模型

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The cosmological constant problem [1], that phase transitions in the early Universe would have left the cosmological constant larger than the observed upper bound, A > 10~(-84)(GeV)~2[1,2], by about 120 order of magnitude, is a major puzzle of cosmology and particle physics. Considerable efforts were made in seeking its solution [1]. One approach attempts to avoid this impasse by allowing A to vary smoothly with time so that models in which it was appreciable in the past could be constructed [1]. Examples are the models of Ozer and Taha [1], Chen and Wu [4], as well as some of their later generalizations [5,6], all of which require A ∝ R~(-2), where R is the Robertson-Walker (RW) scale factor. Recently Carvalho, Lima and Waga [7] proposed the ansatz
机译:宇宙常数问题[1],即宇宙早期的相变会使宇宙常数比观察到的上限A> 10〜(-84)(GeV)〜2 [1,2]大120倍左右。数量级是宇宙学和粒子物理学的主要难题。在寻求解决方案方面做出了相当大的努力[1]。一种方法试图通过允许A随时间平滑变化来避免这种僵局,从而可以构建过去可以理解的模型[1]。示例包括Ozer和Taha [1],Chen和Wu [4]的模型,以及他们后来的一些概括[5,6],所有这些都需要A ∝ R〜(-2),其中R是Robertson-Walker(RW)比例因子。最近,Carvalho,Lima和Waga [7]提出了ansatz

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    《Hadronic Journal》 |2011年第1期|p.49-70|共22页
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