Conveners
分会报告（理论）
- 丁 然
分会报告（理论）
- 陈 绍龙
分会报告（理论）
- 祝 斌
分会报告（理论）
- 周 也铃
分会报告（理论）
- 汤 勇
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安 海鹏 (Tsinghua University)08/05/2023, 14:00
Searching for dark photon dark matter with radio telescopes
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高 宇 (IHEP, CAS)08/05/2023, 14:20
I will discuss emerging ideas in resonant haloscope searches for axionic dark matter. Axion like particles, like those from string orgin, have a very broad mass range and can lie outside the optimal range for a traditional EM resonance cavity design. Front-end narrow band frequency selection can be provided via electronic resonances that provide the necessary high Q quality factor for a via...
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韩 成成08/05/2023, 14:40
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张 云龙08/05/2023, 15:00
The coherent oscillation of ultralight dark matter can induces changes in gravitational potential with the frequency in the nanohertz range. This effect is known to produce a monochromatic signal in the pulsar timing residuals. Here we discuss a multifield scenario that produces a wide spectrum of frequencies, such that the ultralight particle oscillation can mimic the pulsar timing signal of...
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刘 佐伟 (南京大学)08/05/2023, 15:40
Light millicharged particles can be copiously produced from meson decays in cosmic ray collisions with the atmosphere, leading to detectable signals in large underground neutrino detectors. In this paper we study a new channel to produce millicharged particles in the atmosphere, the proton bremsstrahlung process. We find that the proton bremsstrahlung channel can produce a much larger flux of...
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宋 宁强 (Institute of Theoretical Physics, Chinese Academy of Sciences)08/05/2023, 16:00
Celestial bodies are well motivated laboratories for dark matter searches. As an example, dark matter may scatter multiple times in the Earth and get trapped by the Earth's gravitational potential. These dark matter could subsequently annihilate into Standard Model particles and heat the Earth. Taking advantage of Monte-Carlo simulations with detailed analytical computations, we obtain...
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康 现伟 (北京师范大学)08/05/2023, 16:20
A dark matter with a large mass splitting can evade traditional virialized DM direct detection.
In this study, we connect the concept of cosmic-ray accelerated DM in our Milky Way and the direct detection of inelastic scattering in underground detectors to explore spectra that result from several interaction types of the inelastic DM. We find that the mass splitting δ < O(1 GeV) can still be...
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徐 延浩08/05/2023, 16:40
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吴 永成 (Nanjing Normal University)08/05/2023, 17:00
Dark Matter is an important direction for pursuing physics beyond the Standard Model. There are already various experiments searching for the Dark Matter. However, for the Freeze-In Dark Matter, due to the extremely tiny coupling between the dark matter and SM particles, there will be no sensitivity for the DM experiments. On the other hand, we actually have no direct evidence for the...
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王 亚坤 (Peking University)08/05/2023, 17:20
原子核无中微子双贝塔衰变是粒子物理与原子核物理研究领域的前沿，是可能突破粒子物理标准模型的重要方向。目前，国内外有多家实验组都在致力于寻找无中微子双贝塔衰变过程。在理论研究方面，相关原子核矩阵元的可靠计算是关键也是难点。为实现可靠的原子核矩阵元计算，我们通过结合先进的组态相互作用壳模型和相对论密度泛函，发展了相对论组态相互作用密度泛函理论。在本次报告中，我将介绍新发展理论方法的核心思想、优势以及在原子核无中微子双贝塔衰变研究方面的最新进展，并给出原子核三轴形变自由度在核矩阵元可靠描述方面的重要作用。
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曹 俊杰09/05/2023, 16:00
Singlino Dark Matter in General Next-to-Minimal Supersymmetric Standard Model
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黄 达09/05/2023, 16:20
In light of the recent measurement of the nonzero Cosmic Microwave Background (CMB) polarization rotation angle from the Planck 2018 data, we explore the possibility that such a cosmic birefringence effect is induced by coupling a fermionic current with photons via a Chern-Simons-like term. We begin our discussion by rederiving the general formulae of the cosmic birefringence angle with...
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谢 柯盼 (Beihang University)09/05/2023, 16:40
We propose a novel scenario for dark matter (DM) in which weakly interacting massive particles (WIMPs) can freeze-in due to a first-order phase transition (FOPT) in the early Universe. The FOPT dilutes the preexisting DM density to zero, and leads to a sudden change in DM mass that prevents WIMPs from re-equilibrating due to their large mass-to-temperature ratio. Following the FOPT, WIMPs are...
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卢 致廷 (Nanjing Normal University)09/05/2023, 17:00
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,...
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武 雷 (Nanjing Normal University)09/05/2023, 17:20
Boosted dark matter is a popular scenario in DM direct detection. I will talk about the impact of quasi-elastic and deep inelastic scattering of boosted DM with the nucleus, and maybe also the prospects of searching for boosted DM by using plasmon effect (up to our progress).
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黄 样09/05/2023, 17:40
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曹 周键11/05/2023, 14:00
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任 智祥11/05/2023, 14:20
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陈 弦11/05/2023, 14:40
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郭 怀珂 (中国科学院大学（ICTP-AP）)11/05/2023, 15:00
我将介绍一些新物理基于引力波探测的研究：包含在LIGO对早期宇宙相变、宇宙弦引力波的直接实验探测，对超轻暗物质如暗光子、宏观暗物质如原初黑洞和孤子星的探测等。
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黄 发朋 (Sun Yat-sen University)11/05/2023, 15:20
我们研究用引力波信号和射电信号来探测以轴子或暗光子为代表的超轻暗物质，预期为暗物质的研究提供新的思路。
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杜 明辉11/05/2023, 16:00
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张 睿 (IHEP)11/05/2023, 16:20
Understanding the origin and nature of dark energy is one of the greatest challenges of modern science. In this work, we investigate dark energy on astrophysical scales and provide a cosmology-independent method to measure its equation-of-state parameter $w$. First we introduce the concept of a perfect fluid in any static, curved spacetime and reexpress the energy-momentum tensor of the fluid...
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蔡 岳霖 (Purple Mountain Observatory)11/05/2023, 16:40
We explore the potential of precision cosmological data to study non-minimal dark sectors by updating the cosmological constraint on the mirror twin Higgs model (MTH). The MTH model addresses the little Higgs hierarchy problem by introducing dark sector particles. In this work, we perform a Bayesian global analysis that includes the latest cosmic shear measurement from the DES three-year...
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卢 伯强 (Huzhou University（湖州师范学院）)11/05/2023, 17:00
Although searches for dark matter have lasted for decades, no convincing signal has been found without ambiguity in underground detections, cosmic ray observations, and collider experiments. We show by example that gravitational wave (GW) observations can be a supplement to dark matter detections if the production of dark matter follows a strong first-order cosmological phase transition. We...
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张 振华 (Tsinghua University)11/05/2023, 17:20
基于CDEX-10在中国锦屏地下实验室中p型点电极阈值为160eVee高纯锗探测器205.4公斤天实验数据，给出了质量范围在1E15至7E16g原初黑洞（PBH）蒸发keV至MeV轻暗物质粒子（χ）的搜寻结果。在目前PBH限制丰度下，结果排除χ-核子弹性散射截面区域有：对于质量为5E15 g的PBH, 1 keV到24 MeV的χ对应3.4E-32到2.3E-29 cm2；对于质量为7E16 g的PBH， 1 keV到0.6 MeV的χ对应1.1E-28到7.6E-28 cm2。如果将来能够测定χ-核子弹性散射截面，那么PBH的丰度可能会受到χ蒸发的严格限制。
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Jiajun Wu
We explain the $W$-boson mass anomaly by introducing an $SU(2)_L$ scalar multiplet with general isospin and hypercharge in the case without its vacuum expectation value. It is shown that the dominant contribution from the scalar multiplet to the $W$-boson mass arises at one-loop level, which can be expressed in terms of the electroweak (EW) oblique parameters $T$ and $S$ at the leading order....
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Zhou Yu-Feng
We present a novel appraoch for the detection of gravitational waves.
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许 武龙 (Beijing University of Technology)
If dark matter has a finite size, the intrinsic interaction responsible for the structure formation is inevitable from the perspective of dark matter self-scattering. To describe the circumstance in which the binding force realizes the finite size dark protons, we first use the eikonal approximation to simplify the convoluted scattering between dark protons into the case at the t 1⁄4 0 limit....
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葛 帅良
Ultralight axions and dark photons are compelling candidates for dark matter. In this talk, I will provide an overview of my recent work (arXiv:2207.05767, 2301.03622, and 2304.01056) on detecting radio-frequency axions and dark photons using radio telescopes. The detectability relies on two distinct underlying mechanisms. One mechanism involves local dark photon dark matter inducing harmonic...
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由俊 陆