论文标题
Axion String Signatures II：宇宙等离子体对撞机
Axion string signatures II: A cosmological plasma collider
论文作者
论文摘要
我们研究QCD轴弦和超灯轴弦（轴线）的早期和晚期特征。我们将重点放在电磁场的电荷沉积上，以及随后由于结合态形成而导致的新型中和机制。虽然早期的宇宙签名似乎不太可能，但仍有大量的较晚签名。穿过星系的轴弦获得了巨大的电荷密度，该密度被形成一个维度“原子”的结合状态标准模型颗粒的致密等离子体中和。弦上的带电的波数据包以及外部的密集血浆，几乎以光速沿着弦的速度行驶。这些高能量等离子体的包装与高达$ 10^{9} $ GEV的质量中心相撞。这些碰撞可能具有比太阳能发光度大的七个数量级的亮度，并且可以持续数千年，即使它们在宇宙学上发生在远处，它们在射电望远镜上也可以看到。新的可观察物与最近提出的超灯轴弦的CMB可观察物互补，并且对类似的动机参数范围很敏感。
We study early and late time signatures of both QCD axion strings and hyperlight axion strings (axiverse strings). We focus on charge deposition onto axion strings from electromagnetic fields and subsequent novel neutralizing mechanisms due to bound state formation. While early universe signatures appear unlikely, there are a plethora of late time signatures. Axion strings passing through galaxies obtain a huge charge density, which is neutralized by a dense plasma of bound state Standard Model particles forming a one dimensional "atom". The charged wave packets on the string, as well as the dense plasma outside, travel at nearly the speed of light along the string. These packets of high energy plasma collide with a center of mass energy of up to $10^{9}$ GeV. These collisions can have luminosities up to seven orders of magnitude larger than the solar luminosity, and last for thousands of years, making them visible at radio telescopes even when they occur cosmologically far away. The new observables are complementary to the CMB observables for hyperlight axion strings that have been recently proposed, and are sensitive to a similar motivated parameter range.
