Gravitational wave from dark sector with dark pion
Gravitational wave from dark sector with dark pion
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DOI：
10.1088/1475-7516/2017/07/044
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发表时间：
2017-04
影响因子：
6.4
通讯作者：
K. Tsumura;M. Yamada;Yuya Yamaguchi
中科院分区：
文献类型：
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作者：
K. Tsumura;M. Yamada;Yuya Yamaguchi
本文研究了暗量子色动力学（dQCD）扇区中手征对称性破缺产生的引力波谱。暗介子（π）可以作为弱相互作用大质量粒子（WIMP）或强相互作用大质量粒子（SIMP）的候选者。在WIMP情形下，引入dQCD扇区与标准模型（SM）扇区的经典标度不变性耦合，研究了暗π介子通过2π → 2 SM过程的湮灭过程.对于SIMP情形，我们利用手征微扰理论研究了暗π介子作为SIMP时的3π → 2π湮灭过程.我们发现，在WIMP方案中，未来的空间引力波天线可以观测到引力波背景谱。另一方面，当暗π介子是SIMP暗物质时，在手征微扰极限和π-π散射截面的约束下，手征相变变为交叉，引力波不产生.
In this work, we investigate the spectra of gravitational waves produced by chiral symmetry breaking in dark quantum chromodynamics (dQCD) sector. The dark pion (π) can be a dark matter candidate as weakly interacting massive particle (WIMP) or strongly interacting massive particle (SIMP). For a WIMP scenario, we introduce the dQCD sector coupled to the standard model (SM) sector with classical scale invariance and investigate the annihilation process of the dark pion via the 2π → 2 SM process. For a SIMP scenario, we investigate the 3π → 2π annihilation process of the dark pion as a SIMP using chiral perturbation theory. We find that in the WIMP scenario the gravitational wave background spectra can be observed by future space gravitational wave antennas. On the other hand, when the dark pion is the SIMP dark matter with the constraints for the chiral perturbative limit and pion-pion scattering cross section, the chiral phase transition becomes crossover and then the gravitational waves are not produced.