论文标题
改进的热暗物质绑定在QCD轴上
Improved hot dark matter bound on the QCD axion
论文作者
论文摘要
我们通过求解动量依赖性的玻尔兹曼方程来加强轴心质量上的宇宙学结合，并使用源自锥形散射数据得出的现象学生产率，克服了手脑扰动理论的崩溃。使用当前的宇宙学数据集，我们获得$ M_A \ LEQ 0.24〜 \ text {ev} $。为了进一步改善界限并利用即将进行的宇宙学调查的范围，需要在QCD交叉上方的可靠的非扰动计算。
We strengthen the cosmological bound on the axion mass, by solving the momentum-dependent Boltzmann equations for axion-pion scatterings and by using a phenomenological production rate derived from pion-pion scattering data, overcoming the breakdown of chiral perturbation theory. Using present cosmological datasets we obtain $m_a\leq 0.24~\text{eV}$. To further improve the bound and exploit the reach of upcoming cosmological surveys, reliable non-perturbative calculations above the QCD crossover are needed.
