Conveners
GW
- Yunlong Zhang (USTC)
- Wenbiao Han
GW
- Liewen Chen (SJTU)
- Xiao Gang He (Shanghai Jiao Tong University, Tsung-Dao Lee Institute)
The search for primordial non-Gaussianity is an important probe of the early universe and can provide valuable information about the physics of inflation. I will discuss the possibility of measuring primordial non-Gaussianity through space-borne measurements of the cosmological gravitational wave background. We focus on the scalar non-Gaussianity generated during inflation, which can leave an...
The direct discovery of gravitational waves (GWs) from the coalescence of compact binary components by the LIGO/Virgo/KAGRA Collaboration provides an unprecedented opportunity for exploring the underlying theory of gravity. The gravitational waves, after their generation, will be propagating at cosmological distances before they are detected and can provide invaluable information on the...
大统一理论旨在统一电磁、强和弱三种基本相互作用。其经典预言是质子衰变。目前尚未发现质子衰变的迹象，这对大统一能标带来较强的限制。在SO(10)大统一理论中，由于标准模型费米子都是安排在一个不可约表示下，夸克和轻子的质量与味混合是相互关联的。伴随着中微子实验进入精确测量时代，来自费米子味混合的实验数据对大统一的限制开始逐渐被慎重对待。此外，SO(10)大统一模型还可以产生宇宙弦并辐射出引力波，这使得我们还可以从宇宙学观测的角度去认识大统一理论。我将讨论上面提及的不同类型的实验限制，并给出目前符合所有实验数据的大统一模型。
The Galactic center gamma-ray excess (GCE) is a long-standing unsolved problem. One of candidate solutions, the dark matter (DM) annihilation, has been recently tested with other astrophysical observations, such as AMS-02 electron-positron spectra, Fermi Dwarf spheroidal galaxies gamma-ray data, and so on. By assuming that the DM particles annihilate purely into a normal charged fermion pair,...
Extreme mass ratio inspirals (EMRIs) are among the
most promising sources for space-based gravitational wave detectors. For EMRIs, the small compact object spends the last few years inspiralling deep inside the strong gravitational field around the massive BH with a highly relativistic speed. The emitted GWs from EMRI/IMRI encode rich information about the spacetime geometry around the MBH...
Due to the large excursion of the inflaton field. The parameters, such as mass and couplings of the fields coupled to the inflaton field, may change dastically during inflation. And thus phase transitions may be induced. In this talk, I am going to discuss the gravitational wave signals produced by phase transitions during inflation. For first-order phase transitions, I will show that the...
We systematically discuss the deep connection between TianQin and the fundamental problems in particles cosmology, including the gravitational wave detection of dark matter, electroweak baryogenesis and so on.
暗物质与夸克物质是两类极端物态，前者的物理本质尚不清楚，后者是否能够在中子星内部存在也是一个前沿科学问题。报告中我将介绍近几年暗物质间接探测的相关研究进展，对一些候选疑似信号进行重点讨论；我还将介绍现阶段基于多信使数据的中子星物态方程的研究，特别是关于最重的中子星内部存在夸克物质的可能性。
Hydrogen atoms in the universe emit radiation at a wavelength of 21 cm in the radio band, making the 21-cm radiation a powerful tool for exploring the cosmos. 21-cm line observations open a new window for cosmological investigations. By utilizing the 21-cm signal, we can probe the entire evolutionary history of the universe after the recombination epoch and perform a tomographic exploration...
