早期宇宙中的夸克-强子跃迁
The Quark-Hadron Transition in the Early Universe
摘要：
我们利用最近的格点量子色动力学结果计算了宇宙学中夸克-强子跃迁时宇宙的膨胀规律。为此，介绍了利用压力和能量密度数据以及相关误差条的适当技术。我们还实施了适当的技术，以关联的T范围，其中晶格输出可与较低和较高的T的，我们测试合适的表达式。最后，我们比较的宇宙学行为发现使用晶格数据的情况下，过渡是一阶，虽然不是那么远的交叉过渡，我们研究的。用宇宙学数据来检验，差异很小，但精确宇宙学时代的到来可能会打开一条通道，通过它们来检查QCD跃迁。
英文摘要：
We use recent lattice QCD outputs to work out the expansion law of the Universe during the cosmological quark--hadron transition. To do so, a suitable technique to exploit both pressure and energy density data, with the related error bars, is introduced. We also implement suitable techniques to relate the T range where lattice outputs are available with lower and higher T's, for which we test suitable expressions. We finally compare the cosmological behavior found using lattice data with the one obtainable in the case the transition were first order, although not so far from the crossover transition we studied. Differences are small to be tested with cosmological data, but the coming of the era of precision cosmology might open a channel to inspect the QCD transition through them.
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