Xin Deng, Xuewen Liu, Jing Yang, Ruiyu Zhou, Ligong Bian
Domain walls can form after breakdown of a discrete symmetry induced by first-order phase transition, we study the heavy dark matter produced around the temperature of the phase transition that yields the breakdown of a $\mathbb{Z}_{3}$ symmetry. The generated gravitational waves by domain walls decay is found to be able to probed by the Pulsar Timing Arrays, and the future Square Kilometer Array.
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In the purely gravitational dark matter scenario, the dark matter particle does not have any interaction except for gravitational one. We study the gravitational particle production of dark matter particle in such a minimal setup and show that correct amount of dark matter can be produced depending on the inflation model and the dark matter mass. In particular, we carefully evaluate the particle production rate from the transition epoch to the inflaton oscillation epoch in a realistic inflation model and point out that the gravitational particle production is efficient even if dark matter mass…
We propose a mechanism of elementary thermal dark matter with mass up to $10^{14}$ GeV, within a standard cosmological history, whose relic abundance is determined solely by its interactions with the Standard Model, without violating the perturbative unitarity bound. The dark matter consists of many nearly degenerate particles which scatter with the Standard Model bath in a nearest-neighbor chain, and maintain chemical equilibrium with the Standard Model bath by in-equilibrium decays and inverse decays. The phenomenology includes super heavy elementary dark matter and heavy relics that decay a…
Gravitational waves signatures from dynamical scalar field configurations provide a compelling observational window on the early universe. Here we identify intriguing connections between dark matter and scalars fields that emit gravitational waves, either through a first order phase transition or oscillating after inflation. To study gravitational waves from first order phase transitions, we investigate a simplified model consisting of a heavy scalar coupled to a vector and fermion field. We then compute gravitational wave spectra sourced by inflaton field configurations oscillating after E-Mo…
An axion rotating in field space can produce dark photons in the early universe via tachyonic instability. This explosive particle production creates a background of stochastic gravitational waves that may be visible at pulsar timing arrays or other gravitational wave detectors. This scenario provides a novel history for dark photon dark matter. The dark photons may be warm at a level detectable in future 21-cm line surveys. For a consistent cosmology, the radial direction of the complex field containing the axion must be thermalized. We explore a concrete thermalization mechanism in detail an…
Probing dark radiation with inflationary gravitational waves
最近的宇宙学观测表明存在额外的轻物质，即，暗辐射在本文中，我们表明暗辐射的签名是印在暴胀引力波的频谱。如果暗辐射是由大质量粒子衰变产生的，则引力波的高频模被抑制。此外，由于暗辐射引起的各向异性应力的影响，引力波谱可能在暗辐射产生时进入视界的频率处出现下降。一旦对引力波谱进行了详细的实验研究，我们就可以推断出宇宙中暗辐射是如何以及何时产生的信息。
Gravitational Waves From a Dark (Twin) Phase Transition
在这项工作中，我们表明，一个大类的模型与一个复合暗部门经历了强烈的一阶相变在早期宇宙，这可能会导致一个可检测的引力波信号。我们总结了SU（N）暗扇区强一级相变的基本条件，计算了引力波谱，并表明，依赖于暗约束尺度，它可以在eLISA或脉冲星定时阵列实验中检测到。的引力波信号提供了一个独特的测试的引力相互作用的黑暗部门，我们讨论了与传统的搜索新的黑暗部门的互补性。讨论包括双希格斯和SIMP模型，以及对称和非对称的复合暗物质的情况。
We consider the simplest possibility for a model of particle dark matter in which dark matter has only gravitational interaction with the standard model sector. Even in such a case, it is known that the gravitational particle production in an expanding universe may lead to a correct relic abundance depending on the inflation scale and the mass of dark matter particle. We provide a comprehensive and systematic analysis of the gravitational particle production of fermionic and vectorial dark matter, and emphasize that particles which are much heavier than the Hubble parameter but lighter than in…
We study the possibility of monopoles serving as dark matter when they are produced during the first-order phase transition in the dark sector. Our study shows that dark monopoles can contribute only a small piece of dark matter relic density within parameter spaces where strong gravitational waves can be probed by ET and CE, and the monopoles can contribute a sizable component of the observed dark matter relic density for fast phase transitions with short duration.
Nanohertz gravitational waves from cosmic strings and dark photon dark matter
本文研究了PTA观测结果对宇宙弦及由其衰变产生的暗光子暗物质的物理意义，发现暗光子质量在m~10^{-6}--10^{-4}eV时可同时解释PTA引力波信号与暗物质丰度。
Gravitational Focusing and Substructure Effects on the Rate Modulation in Direct Dark Matter Searches
我们研究了太阳对暗物质的引力聚焦（GF）如何影响非定向直接暗物质搜索中预期信号的年度和两年调制，在局部暗晕中存在暗物质子结构.我们认为人马座流和一个可能的黑暗的磁盘，并表明，GF抑制一些，但不是所有的显着特点，将表征子结构的黑暗晕被GF忽略。
We generalise existing constraints on primordial black holes to dark objects with extended sizes using the aLIGO design sensitivity. We show that LIGO is sensitive to dark objects with radius $O(10-10^3~{\rm km})$ if they make up more than $\sim O(10^{-2}-10^{-3})$ of dark matter.
Non-gravitational signals of dark energy under a gauge symmetry
本文在暗能量部门的规范对称性框架内研究暗能量的非引力信号，提出若暗能量场遵循规范对称性，即可在统一规范原理下研究宇宙所有主要成分，为探索暗能量提供了新途径。
We consider gravitational wave signals produced by a first-order phase transition in a theory with a generic renormalizable thermal effective potential of power law form. We find the frequency and amplitude of the gravitational wave signal can be related in a straightforward manner to the parameters of the thermal effective potential. This leads to a general conclusion; if the mass of the dark Higgs is less than 1% of the dark Higgs vacuum expectation value, then the gravitational wave signal will be unobservable at all upcoming and planned gravitational wave observatories.
Cosmological Constraints on the Gravitational Interactions of Matter and Dark Matter
虽然有压倒性的证据表明，暗物质的引力相互作用，我们仍然不知道它的精确引力相互作用强度或它是否遵守等效原理。使用最新的宇宙学数据和$Λ\mbox{CDM}$的框架内工作，我们首先更新所有物质的牛顿常数的测量值：$G_N=7.26^{+0.27}_{-0.27}\times 10^{-11}\,\mbox{m}^{3}\mbox{kg}^{-1}\mbox{s}^{-2}$，它与标准实验室值相差$2.2 σ$。在广义相对论中，暗物质等效原理的破缺可以通过超轻标量场介导的长程暗物质力来模拟。利用普朗克三年的观测数据，我们发现暗物质的“第五力”强度被限制为弱于引力的$10^{-4}$。我们还介绍了一个唯象的，后牛顿双流体的描述，明确打破等效原理，通过引入暗物质的惯性和引力质量之间的差异。根据暗物质和普通物质流体的退耦时间，暗物质的引力质量与惯性质量之比在$10^{-6}$水平上被限制为1。
Dark Matter and Dark Energy from Gravitational Symmetry Breaking
基于伪Nambu-Goldstone暗物质（DM）粒子质量变化引起的等效原理的松弛，建立了一个整体U（1）对称性的引力对称性破缺（GSB）机制.这GSB过程中所描述的修改后的宇宙学收敛机制的异常加权能量（AWE）假说先前介绍的作者。几个显着的约束，从遥远的超新星的哈勃图导出，特别是在显式和引力对称性破缺的能量尺度的模型。然后，我们简要介绍了一些后果中微子质量时，这一机制被应用到轻子数对称性破缺的特殊情况。
In anticipation of upcoming gravitational wave experiments, we provide a comprehensive overview of the spectra predicted by phase transitions triggered by states from a large variety of dark sector models. Such spectra are functions of the quantum numbers and (self-) couplings of the scalar that triggers the dark phase transition. We classify dark sectors that give rise to a first order phase transition and perform a numerical scan over the thermal parameter space. We then characterize scenarios in which a measurement of a new source of gravitational waves could allow us to discriminate betwee…
Ultra-light primordial black holes with masses $M_{BH}<10^9$~g evaporate before big-bang nucleosynthesis producing all matter fields, including dark matter, in particular super-heavy dark matter: $M_{DM}\gtrsim 10^{10}$ GeV. If the dark matter gets its mass via $U(1)$ symmetry-breaking, the phase transition that gives a mass to the dark matter also produces cosmic strings which radiate gravitational waves. Because the symmetry-breaking scale $Λ_{CS}$ is of the same order as $M_{DM}$, the gravitational waves radiated by the cosmic strings have a large enough amplitude to be detectable across al…
Effect of Gravitational Focusing on Annual Modulation in Dark-Matter Direct-Detection Experiments
在暗物质直接探测实验中，由于地球绕太阳的轨道，散射率应该每年调整一次。通常认为，这种速率在6月1日左右达到极值，此时地球相对于暗物质风的相对速度最大。我们指出，引力聚焦可以改变这种调制阶段。未束缚的暗物质粒子被太阳的引力势聚焦，影响它们在实验室框架中的相空间密度。引力聚焦可以导致年度调制相位的显著整体偏移，这与低散射速度的暗物质最相关。对于O（10）GeV的暗物质，感应相移也可能是显著的，这取决于实验的阈值能量。
Seeing in the Dark: Gravitational Waves from Resonant Production of Dark Photon Dark Matter
本研究针对超轻暗光子暗物质，通过3D格点模拟探究阿贝尔-希格斯模型中参量共振的非线性效应，预测其产生的随机引力波信号，为探测该暗物质提供新途径。
Gravitationally Misaligned Ultralight Dark Matter and Implications for Neutron Stars
该研究探讨早期宇宙中通过非最小引力耦合失准的超轻标量暗物质可能性，发现特定质量范围下中子星引力效应可对模型参数空间施加限制，无需暗物质与普通物质的非引力相互作用。
Gravitational wave, collider and dark matter signals from a scalar singlet electroweak baryogenesis
我们分析了一个简单的扩展的SM，只是一个额外的标量单耦合到希格斯玻色子。我们讨论了这个模型中可能的探测器，包括对撞机搜索，引力波和直接的暗物质探测信号。我们表明，大部分的模型参数空间存在的观测引力波将允许检测，而间接对撞机搜索不会。
Gravitational Dark Matter from Minimal Preheating
本文研究最小预加热中引力暗物质的产生，通过格点方法计算遗迹丰度，发现对于n=4和6，凝聚体湮灭占主导，并给出相应的暗物质质量预测。
Dark Photon Dark Matter from Cosmic Strings and Gravitational Wave Background
本文通过三维格点模拟发现轻矢量玻色子由宇宙弦环坍缩高效产生，计算了其引力波背景谱特征，表明现有地面探测器和脉冲星计时观测可探测或约束暗光子暗物质场景。
Too Heavy to Hide: Gamma-Ray Constraints on Annihilating Dark Matter beyond Unitarity
利用西藏ASγ、LHAASO等探测器的高能伽马射线数据，对质量在10^5–10^12 GeV的复合暗物质湮灭进行模型无关搜索，给出了世界领先的湮灭截面上限。
We calculate the accurate spectrum of the stochastic gravitational wave background from U(1) gauge fields produced by axion dark matter. The explosive production of gauge fields soon invalidates the applicability of the linear analysis and one needs nonlinear schemes. We make use of numerical lattice simulations to properly follow the nonlinear dynamics such as backreaction and rescattering which gives important contributions to the emission of gravitational waves. It turns out that the axion with the decay constant $f \sim 10^{16}$ GeV which gives the correct dark matter abundance predicts th…
We point out that dark matter which is produced non-adiabatically in a phase transition (PT) with fast bubble walls receives a boost in velocity which leads to long free-streaming lengths. We find that this could be observed via the suppressed matter power spectrum for dark matter masses around $10^8 - 10^9$ GeV and energy scales of the PT around $10^{2} - 10^3$ GeV. The PT should take place at the border of the supercooled regime, i.e. approximately when the Universe becomes vacuum dominated. This work offers novel physics goals for galaxy surveys, Lyman-$α$, stellar stream, lensing, and 21-c…
Gravitational freeze-in dark matter from Higgs Preheating
本文研究了Higgs preheating期间基于非微扰共振的引力freeze-in暗物质产生机制，发现通过格点方法可证明快子共振被强反作用禁止，而参数共振在紫外尺度下调整Higgs自相互作用耦合后可行，并推导出暗物质遗迹密度，揭示了暗物质质量大于暴胀子质量的新参数空间。
We propose a scenario that explains the comparable abundances of dark matter (DM) and baryons without any coincidence in the corresponding particle masses. Here, DM corresponds to heavy "dark baryons" in a hidden MSSM-like dark sector, where the supersymmetry breaking scale can be several orders of magnitude larger than in the visible sector. In both sectors a baryon asymmetry is generated via the Affleck-Dine mechanism, and the smaller dark baryon-to-entropy ratio partially compensates the larger dark baryon masses to give similar densities in the two sectors. The large mass hierarchy also na…
Very Heavy and Composite Dark Matter: Theory and Experimental Searches
本文探讨了远重于弱标度的暗物质的理论和实验研究，包括复合和耗散机制及多散射检测方法。
Gravitational Waves From Dark Binaries With Finite-Range Dark Forces
本文计算了有限范围吸引暗力下暗双星产生的随机引力波背景，发现暗力有限范围显著改变双星初始分布与演化，使引力波谱在中频段增强并呈现“膝”和“踝”特征，亚太阳质量暗双星信号可被天基和地基天文台探测。
A dark matter overdensity around a black hole may significantly alter the dynamics of the black hole's merger with another compact object. We consider here intermediate mass-ratio inspirals of stellar-mass compact objects with intermediate-mass black holes "dressed" with dark matter. We first demonstrate that previous estimates based on a fixed dark-matter dress are unphysical for a range of binaries and dark-matter distributions by showing that the total energy dissipated by the compact object through dynamical friction, as it inspirals through the dense dark matter environment towards the bl…
We consider the model of composite dark matter assuming stable particles of charge $-2$ bound with primordial helium nuclei by Coulomb force in $O$He atoms. We study capture of such dark atoms in matter and propose a possibility of existence of stable $O$-enriched superheavy nuclei and $O$-nuclearites, in which heavy $O$-dark matter fermions are bound by electromagnetic forces with ordinary nuclear matter. $O$He atoms accumulation in stars and its possible effect in stellar evolution is also considered, extending the set of indirect probes for composite dark matter.
A massive astrophysical object deforms a local distribution of dark matter, resulting in a local overdensity of dark matter. This phenomenon is often referred to as gravitational focusing. In the solar system, the gravitational focusing due to the Sun induces modulations of dark matter signals on terrestrial experiments. We consider the gravitational focusing of a light bosonic dark matter with a mass of less than about 10 eV. The wave nature of such dark matter candidates leads to unique signatures both in the local overdensity and in the spectrum, both of which can be experimentally relevant…
We study the stochastic background of gravitational waves which accompany the sudden freeze-out of dark matter triggered by a cosmological first order phase transition that endows dark matter with mass. We consider models that produce the measured dark matter relic abundance via (1) bubble filtering, and (2) inflation and reheating, and show that gravitational waves from these mechanisms are detectable at future interferometers.
We discuss gravitational waves (GWs) induced by a heavy spectator field that starts to oscillate during inflation. During the oscillation of the spectator field, its effective mass can also oscillate in some potentials. This mass oscillation can resonantly amplify the spectator field fluctuations. We show that these amplified fluctuations can induce large GWs, which could be investigated by future gravitational wave observations. This kind of induced GW can be produced even if the spectator field does not have any interaction with other fields except for gravitational interaction.
We analyze the phase transition in improved holographic QCD to obtain an estimate of the gravitational wave signal emitted in the confinement transition of a pure SU(3) Yang-Mills dark sector. We derive the effective action from holography and show that the energy budget and duration of the phase transition can be calculated with minor errors. These are used as input to obtain a prediction of the gravitational wave signal. To our knowledge, this is the first computation of the gravitational wave signal in a holographic model designated to match lattice data on the thermal properties of pure Ya…
Imprints of Dark Photons on Gravitational Wave Polarizations
研究暗光子与引力子的转换过程，揭示其对引力波极化的影响及演变机制。
Constraints on Light Dark Matter from Single-Photon Decays of Heavy Quarkonium
我们在一个有效的接触算符的框架下研究了轻暗物质与标准模型夸克相互作用的约束条件，该框架介导了重味束缚态夸克偶素衰变为暗物质和一个光子。当与衰变到完全不可见的最终状态相结合时，在高强度电子-正电子对撞机上来自重夸克偶素衰变的约束可以补充在高能对撞机上缺失的能量搜索，并提供在直接和间接探测实验中难以探测的暗物质质量的灵敏度。我们计算了$Υ(1 S)$衰变到暗物质和光子的分支分数的近似极限。给出了所有6维或更低维接触算子的分支分数的近似极限，我们给出了每个算子的相互作用强度的相应极限和暗物质-核子散射的推断极限。补充约束暗物质湮灭从伽玛射线搜索矮球状星系也被认为是。
The proposed DarkQuest beam dump experiment, a modest upgrade to the existing SeaQuest/SpinQuest experiment, has great potential for uncovering new physics within a dark sector. We explore both the near-term and long-term prospects for observing two distinct, highly-motivated hidden sector benchmark models: heavy neutral leptons and Higgs-mixed scalars. We comprehensively examine the particle production and detector acceptance at DarkQuest, including an updated treatment of meson production, and light scalar production through both bremsstrahlung and gluon-gluon fusion. In both benchmark model…
Sensitivity forecasts for gravitational-wave detectors to dark matter decaying into gravitons
本文基于暗物质衰变产生引力波背景的理论，预测当前及未来引力波探测器对这类信号的灵敏度。
Dark neutron stars from a heavy dark sector
研究了MSSM隔离副本中由重暗重子组成的暗物质情景下暗中子星的形成与性质，发现其质量和半径通常小于普通中子星，并探讨了通过引力微透镜和暗磁偶极辐射探测的可能性。
Recent pulsar timing data reported by the NANOGrav collaboration may indicate the existence of a stochastic gravitational wave background around $f \sim 10^{-8}$ Hz. We explore a possibility to generate such low-frequency gravitational waves from a dark sector phase transition. Assuming that the dark sector is completely decoupled from the visible sector except via the gravitational interaction, we find that some amount of dark radiation should remain until present. The NANOGrav data implies that the amount of dark radiation is close to the current upper bound, which may help mitigate the so-c…
Composite heavy axion-like dark matter
本文提出复合重轴子类粒子作为新型暗物质候选体，在暗禁闭规范理论中实现，通过重费米子门户抑制电磁耦合，仅需三个参数描述其可观测特征，开辟了新的研究领域。
We consider the direct $s$-channel gravitational production of dark matter during the reheating process. Independent of the identity of the dark matter candidate or its non-gravitational interactions, the gravitational process is always present and provides a minimal production mechanism. During reheating, a thermal bath is quickly generated with a maximum temperature $T_{\rm max}$, and the temperature decreases as the inflaton continues to decay until the energy densities of radiation and inflaton oscillations are equal, at $T_{\rm RH}$. During these oscillations, $s$-channel gravitational pr…
Constraints on cosmological viscosity and self interacting dark matter from gravitational wave observations
研究表明，引力波在理想流体中传播时不会发生色散或耗散。然而，如果介质具有非零剪切粘度$η$，则引力波将以与$G \,η$成比例的速率耗散。通过计算GW150914引力波在耗散流体中传播距离为$410\, $ Mpc的耗散，并与理论预测进行比较，我们约束了具有非零剪切粘性的暗物质和暗能量模型.这提供了一个原理证明的事实，即未来的观测引力波在LIGO有可能更好地约束暗物质和暗能量的粘度。
The origin and main properties of new heavy hadrons as dark matter candidates, are represented. Low-energy interactions of new hadrons with leptons and nucleons are described in the terms of effective vertexes. We consider the lowest excited levels of new mesons in the frame-work of the Heavy Quark Effective Theory. The effect of fine and hyper-fine splitting of excited states follows directly from this theory. We analyze phenomenological consequences of this effect as manifestation of dark matter particles.
Searching for light Dark Matter in heavy meson decays
在共振阈值下运行的e+电子工厂具有研究B_q（D）介子对衰变中轻暗物质粒子产生的独特能力。本文研究了末态能量缺失的重介子衰变中轻暗物质的产生，如B_q（D^0）->“缺失能量”和B_q（D^0）-> γ+“缺失能量”.我们认为，这样的转变可以在当前的味道工厂（和未来的超级味道工厂）通过标记与B_q（D^0）衰变的“另一边”的能量损失的衰变进行研究。
We study the gravitational production of super-Hubble-mass dark matter in the very early universe. We first review the simplest scenario where dark matter is produced mainly during slow roll inflation. Then we move on to consider the cases where dark matter is produced during the transition period between inflation and the subsequent cosmological evolution. The limits of smooth and sudden transitions are studied, respectively. The relic abundances and the cosmological collider signals are calculated.
We re-examine current and future constraints on a heavy dilaton coupled to a simple dark sector consisting of a Majorana fermion or a Stückelberg vector field. We include three different treatments of dilaton-Higgs mixing, paying particular attention to a gauge-invariant formulation of the model. Moreover, we also invite readers to re-examine effective field theories of vector dark matter, which we show are missing important terms. Along with the latest Higgs coupling data, heavy scalar search results, and dark matter density/direct detection constraints, we study the LHC bounds on the model a…
Observable Heavy Higgs Dark Matter
暗物质（DM），由惰性希格斯双重粒子产生，可能是轻的，低于$W$质量，也可能是重的，高于525 GeV。虽然轻区域可能很快就会被排除在外，但重区域是已知的，无论是直接探测（DD）实验还是大型强子对撞机（LHC）都很难探测。我们发现，添加第二个惰性希格斯双重有助于使重DM区访问DD和大型强子对撞机，通过增加其耦合到观察到的希格斯玻色子，或降低其质量到$360 \gev \lesssim m_{DM}$，或两者兼而有之。
Supersymmetric dark matter, catalyzed BBN, and heavy moduli in mSUGRA with gravitino LSP and stau NLSP
在mSUGRA模型中，我们假设引力子（LSP）在宇宙中扮演冷暗物质的角色，而最轻的粒子（NLSP）则催化原初BBN，以调和理论与观测之间的差异。我们考虑了所有的引力子产生机制，即从重标量场衰变，从NLSP衰变，从热浴。我们发现，暗物质的约束是不相容的再加热温度的下限
Super-Heavy Dark Matter - Towards Predictive Scenarios from Inflation
柯尔曼-温伯格暴胀的一般预测是存在一个重粒子扇区，它与暴胀子（该扇区中最轻的状态）的相互作用在回路水平上产生暴胀子势。对于典型的相互作用，重扇区可能包含稳定状态，其残余丰度在暴胀结束时仅由引力产生。这一普遍特征，以及迄今为止没有任何暗物质的粒子物理信号，促使我们在暗区物理学中寻找新的方向，包括暗物质超重的情况。在这篇文章中，我们研究的可能性，暗物质甚至比暴胀子更重，它的存在遵循暴胀子动力学，它今天的丰度是{ \it自然}由引力相互作用的弱点决定。这意味着超重暗物质可以通过测量暴胀参数和/或CMB等曲率扰动和非高斯性来检验。我们明确的工作的三个科尔曼-温伯格暴胀的情况下，研究超重暗物质生产在这些情况下的系统学的细节，并计算哪些部分的参数空间可以探测未来的CMB测量。
Heavy Scalar Dark Matter
具有$SU(2)_L$量子数的标量场提供了几种可行的TeV尺度左右的暗物质候选者。由于标量四次相互作用，所观察到的遗迹密度可以获得大范围的质量，我们确定。反过来，标量耦合的约束导致可测试的预测，在未来的直接和间接的搜索。
Constraining Millicharged dark matter with Gravitational positivity bounds
本文利用引力正性约束，结合宇宙学与天体物理观测上界，严格约束了具有无质量暗光子的毫电荷费米子暗物质模型参数空间，并发现当暗物质质量低于太阳核心温度时，大部分参数区域被排除。
In the present paper, it is assumed that there exist two species of dark matter: a heavy dark matter particle (HDM) with the mass of O(TeV) which is generated in early universe and a lighter dark matter particle (LDM) which is a relativistic product due to the decay of HDM. HDMs, captured by the earth, decay to high energy LDMs, and these particles can be measured by km$^3$ neutrino telescopes, like the IceCube detector. A $Z^{\prime}$ portal dark matter model is taken for LDMs to interact with nuclei via a neutral current interaction mediated by a heavy gauge boson $Z^{\prime}$. With the diff…
Constraining decaying very heavy dark matter from galaxy clusters with 14 year Fermi-LAT data
本研究利用7个近邻星系团的14年Fermi-LAT数据，考虑多种衰变道与电磁级联效应，采用Navarro-Frenk-White轮廓和轮廓似然法，在95%置信水平下给出了极重衰变暗物质寿命的下限，为相关间接探测提供了互补约束。
We describe the automation of the calculation of perturbative unitarity constraints including scalars that have colour charges, and its release in SARAH 4.14.4. We apply this, along with vacuum stability constraints, to a simple dark matter model with colourful mediators and interesting decays, and show how it leads to a bound on a thermal relic dark matter mass well below the classic Griest-Kamionkowski limit.
Dark Matter Production Associated With a Heavy Quarkonium at B Factories
采用标准模型粒子与暗物质相互作用的有效场论方法，研究了B工厂中与重夸克偶素相关的轻暗物质的产生.我们考虑了暗物质-重夸克相互作用的有效算符，它与重夸克偶素关联的暗物质的产生有关。我们计算了与J/psi或eta_c相关的暗物质产生的截面，并与标准模型背景进行了比较。我们为各种有效算子的新物理能量标度设定了界限，并得到了质量为几个GeV量级的轻暗物质的暗物质-核子散射截面的相应极限。
Effects of gravitational particle production on Higgs portal dark matter
本文研究引力粒子产生对希格斯门户暗物质丰度的影响，发现再加热期间暴胀子相干振荡导致的引力产生通常起主导作用。
We develop a unified model of darkgenesis and baryogenesis involving strongly interacting dark quarks, utilizing the gravitational anomaly of chiral gauge theories. In these models, both the visible and dark baryon asymmetries are generated by the gravitational anomaly induced by the presence of chiral primordial gravitational waves. We provide a concrete model of an SU(2) gauge theory with two massless quarks. In this model, the dark quarks condense and form a dark baryon charge superfluid (DBS), in which the Higgs-mode acts as cold dark matter. We elucidate the essential features of this dar…
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