粒子创造现象能取代暗能量吗？
Can particle creation phenomena replace dark energy?
摘要：
以引力场为代价的粒子创造可能足以解释宇宙的演化历史，而根本不需要暗能量。利马等人在最近的一项工作中研究了这种现象，假设粒子的产生是以宇宙晚期的引力能量为代价的。然而，该模型不满足WMAP约束的物质辐射平等。在这里，我们提出了一个模型，在相同的框架，它完全符合SNIa数据在低红移以及早期的综合萨克斯-沃尔夫效应的物质辐射平等确定的WMAP在高红移。这样一个模型，需要存在近26%的原始物质的重子和CDM的形式。
英文摘要：
Particle creation at the expense of gravitational field might be sufficient to explain the cosmic evolution history, without the need of dark energy at all. This phenomena has been investigated in a recent work by Lima et-al, assuming particle creation at the cost of gravitational energy in the late Universe. However, the model does not satisfy the WMAP constraint on matter-radiation equality. Here, we have suggested a model, in the same framework, which fits perfectly with SNIa data at low redshift as well as early Integrated Sachs-Wolfe effect on matter-radiation equality determined by WMAP at high redshift. Such a model, requires the presence of nearly 26% primeval matter in the form of baryons and CDM.
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