Thermal axion production in the primordial quark-gluon plasma
Thermal axion production in the primordial quark-gluon plasma
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DOI：
10.1103/physrevd.83.075011
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发表时间：
2010-08
影响因子：
5
通讯作者：
P. Graf;F. Steffen
中科院分区：
文献类型：
--
作者：
P. Graf;F. Steffen
本文计算了原初夸克-胶子等离子体中夸克和胶子散射热产生轴子的速率。为了得到与强规范耦合中的主导阶相一致的规范不变的有限结果，我们使用了系统场论方法，如硬热环重算和Braaten-Yuan公式。热产生的产量，去耦温度，和密度参数计算质量低于10毫电子伏的轴子。在这种情况下，当佩切-奎因尺度超过6 ^{10}^{8}^{10}^{8}^{10}^{10
We calculate the rate for thermal production of axions via scattering of quarks and gluons in the primordial quark-gluon plasma. To obtain a finite result in a gauge-invariant way that is consistent to leading order in the strong gauge coupling, we use systematic field theoretical methods such as hard thermal loop resummation and the Braaten-Yuan prescription. The thermally produced yield, the decoupling temperature, and the density parameter are computed for axions with a mass below 10 meV. In this regime, with a Peccei-Quinn scale above $6\ifmmode\times\else\texttimes\fi{}{10}^{8}\text{ }\text{ }\mathrm{GeV}$, the associated axion population can still be relativistic today and can coexist with the axion cold dark matter condensate.