论文标题
宇宙全局弦循环的衰减
Decay of Cosmic Global String Loops
论文作者
论文摘要
由于金石玻色子和巨大的标量（$χ$）颗粒的辐射，我们从数值上研究了宇宙全局弦环的衰变。我们研究的环长度范围为弦芯宽度的200-1000倍。我们发现循环的寿命约为$ \ 1.4 l $。 Goldstone Boson辐射的能量光谱具有$ k^{ - 1} $掉落，其中$ k $是vavenumber，而$ k \ of ym_χ/2 $的尖峰是$m_χ$，其中$m_χ$是$ $χ$的质量。后者是一个新功能，意味着在QCD轴的宇宙学分布中，高能量（MEV-GEV）处于峰值。
We numerically study the decay of cosmic global string loops due to radiation of Goldstone bosons and massive scalar ($χ$) particles. The length of loops we study range from 200-1000 times the width of the string core. We find that the lifetime of a loop is $\approx 1.4 L$. The energy spectrum of Goldstone boson radiation has a $k^{-1}$ fall off, where $k$ is the wavenumber, and a sharp peak at $k \approx m_χ/2$, where $m_χ$ is the mass of $χ$. The latter is a new feature and implies a peak at high energies (MeV-GeV) in the cosmological distribution of QCD axions.
