检索结果-内蒙古大学图书馆

Constraining cosmological parameters using the pairwise kinematic Sunyaev-Zel’dovich effect with CMB-S4 and future galaxy cluster surveys

引用

Physical Review D 2025年第6期111卷 063541-063541页

作者： E. Schiappucci S. Raghunathan C. To F. Bianchini C. L. Reichardt N. Battaglia B. Hadzhiyska S. Kim J. B. Melin School of Physics University of Melbourne Parkville Victoria 3010 Australia Center for AstroPhysical Surveys National Center for Supercomputing Applications Urbana Illinois 61801 USA Center for Cosmology and Astro-Particle Physics The Ohio State University Columbus Ohio 43210 USA Kavli Institute for Particle Astrophysics and Cosmology Stanford University 452 Lomita Mall Stanford California 94305 USA Department of Physics Stanford University 382 Via Pueblo Mall Stanford California 94305 USA SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park California 94025 USA Department of Astronomy Cornell University Ithaca New York 14853 USA Physics Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Berkeley Center for Cosmological Physics Department of Physics University of California Berkeley California 94720 USA Department of Astronomy and Space Science Sejong University 209 Neungdong-ro Gwangjin-gu Seoul 05006 Republic of Korea Department of Physics and Astronomy Sejong University 209 Neungdong-ro Gwangjin-gu Seoul 05006 Republic of Korea Université Paris-Saclay CEA Département de Physique des Particules 91191 Gif-sur-Yvette France

We present a forecast of the pairwise kinematic Sunyaev-Zel’dovich (kSZ) measurement that will be achievable with the future CMB-S4 experiment. CMB-S4 is the next stage for ground-based cosmic microwave background experiments, with a planned wide-area survey that will observe approximately 50% of the sky. We construct a simulated sample of galaxy clusters that have been optically selected in a Legacy Survey of Space and Time–like survey and have spectroscopic redshifts. For this cluster sample, assuming the likelihood is Gaussian, we predict that CMB-S4 will reject the null hypothesis of zero pairwise kSZ signal at 36σ. We estimate the effects of systematic uncertainties such as scatter in the mass-richness scaling relation and cluster miscentering. We find that these effects can reduce the signal-to-noise ratio of the CMB-S4 pairwise kSZ measurement by 20%. We explore the constraining power of the measured kSZ signal in combination with measurements of the galaxy clusters’ thermal SZ emission on two extensions to the standard cosmological model. The first extension allows the dark energy equation of state w to vary. We find the CMB-S4 pairwise kSZ measurement yields a modest reduction in the uncertainty on w by a factor of 1.36 over the Planck’s 2018 uncertainty. The second extension tests general relativity by varying the growth index γ. We find that CMB-S4’s pairwise kSZ measurement will yield a 28σ constraint on γ and strongly constrain alternative theories of gravity.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Light cone distribution amplitude for the Λ baryon from lattice QCD

引用

Physical Review D 2025年第3期111卷 034510-034510页

作者： Min-Huan Chu Haoyang Bai Jun Hua Jian Liang Xiangdong Ji Andreas Schäfer Yushan Su Wei Wang Xiaonu Xiong INPAC Key Laboratory for Particle Astrophysics and Cosmology (MOE) Shanghai Key Laboratory for Particle Physics and Cosmology School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Yang Yuanqing Scientific Computering Center Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai 200240 China Faculty of Physics Adam Mickiewicz University ulica Uniwersytetu Poznańskiego 2 61-614 Poznań Poland Institute of High Energy Physics CAS Beijing 100049 China School of Physics University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Atomic and Subatomic Structure and Quantum Control (MOE) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Institute of Quantum Matter South China Normal University Guangzhou 510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear Science Southern Nuclear Science Computing Center South China Normal University Guangzhou 510006 China Department of Physics University of Maryland College Park Maryland 20742 USA Institut für Theoretische Physik Universität Regensburg D-93040 Regensburg Germany Southern Center for Nuclear-Science Theory (SCNT) Institute of Modern Physics Chinese Academy of Sciences Huizhou 516000 Guangdong Province China School of Physics Central South University Changsha 418003 China

We calculate the leading-twist light cone distribution amplitudes of the Λ(uds) baryon using lattice QCD methods within the framework of large-momentum effective theory. Our numerical computations are carried out with Nf=2+1 stout smeared clover fermions and a Symanzik gauge action on a lattice with spacing a=0.077 fm and a pion mass of 303 MeV. To approach the large-momentum region, we simulate the equal-time correlations with the hadron momentum Pz={2.52,3.02,3.52} GeV. We investigate the analytic properties of the baryon quasidistribution amplitude in coordinate space and validate them through our lattice calculations. After renormalization and extrapolation, we present results for the three-dimensional distribution in momentum fractions of the two light quarks. Based on these findings, we briefly discuss the phenomenological impact on weak decays of Λb and outline potential systematic uncertainties that can be improved in the future. This work lays the theoretical foundation for accessing baryon light cone distribution amplitudes from lattice QCD.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Constraining parity and Lorentz violations in gravity with future ground- and space-based gravitational wave detectors

引用

Physical Review D 2025年第10期111卷 104012-104012页

作者： Bo-Yang Zhang Tao Zhu Jian-Ming Yan Jing-Fei Zhang Xin Zhang Key Laboratory of Cosmology and Astrophysics (Liaoning) College of Sciences Northeastern University Shenyang 110819 China Institute for Theoretical Physics and Cosmology Zhejiang University of Technology Hangzhou 310032 China United Center for Gravitational Wave Physics (UCGWP) Zhejiang University of Technology Hangzhou 310032 China Key Laboratory of Data Analytics and Optimization for Smart Industry (Ministry of Education) Northeastern University Shenyang 110819 China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang 110819 China

The future ground- and space-based gravitational wave (GW) detectors offer unprecedented opportunities to test general relativity (GR) with greater precision. In this work, we investigate the capability of future ground-based GW detectors, the Einstein Telescope (ET) and the Cosmic Explorer (CE), and space-based GW detectors, LISA, Taiji, and TianQin, for constraining parity and Lorentz violations in gravity. We inject several typical GW signals from compact binary systems into GW detectors and perform Bayesian inferences with the modified waveforms with parity and Lorentz-violating effects. These effects are modeled in the amplitude and phase corrections to the GW waveforms with their frequency-dependence described by factors βν, βμ, βν¯, and βμ¯. Our results show that the combined observations of ET and CE will impose significantly tighter bounds on the energy scale of parity and Lorentz violations (MPV and MLV) compared to those given by LIGO-Virgo-KAGRA (LVK) detectors. For cases with positive values of βν, βμ, βν¯, and βμ¯, the constraints on MPV and MLV from ground-based detectors are tighter than those from the space-based detectors. For the case of βμ=−1 space-based GW detectors provide constraints on MPV that are better than current LVK observations and comparable to those from ET and CE. Additionally, space-based detectors exhibit superior sensitivity in constraining MLV for βμ¯=−2 case, which is approximately 3 orders of magnitude tighter than those from ground-based GW detectors. This scenario also enables bounds on the graviton mass at mg≲10−35 GeV. These findings highlight the promising role of future GW observatories in probing fundamental physics beyond GR.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Exploring the baryonic effect signature in the Hyper Suprime-Cam Year 3 cosmic shear two-point correlations on small scales: The S8 tension remains present

引用

Physical Review D 2025年第6期111卷 063509-063509页

作者： Ryo Terasawa Xiangchong Li Masahiro Takada Takahiro Nishimichi Satoshi Tanaka Sunao Sugiyama Toshiki Kurita Tianqing Zhang Masato Shirasaki Kavli Institute for the Physics and Mathematics of the Universe (WPI) The University of Tokyo Institutes for Advanced Study (UTIAS) The University of Tokyo Chiba 277-8583 Japan Department of Physics University of Tokyo Bunkyo Tokyo 113-0031 Japan Center for Data-Driven Discovery (CD3) Kavli IPMU (WPI) UTIAS The University of Tokyo Kashiwa Chiba 277-8583 Japan McWilliams Center for Cosmology Department of Physics Carnegie Mellon University 5000 Forbes Avenue Pittsburgh Pennsylvania 15213 USA Brookhaven National Laboratory Building 510 Upton New York 11973 USA Department of Astrophysics and Atmospheric Sciences Faculty of Science Kyoto Sangyo University Motoyama Kamigamo Kita-ku Kyoto 603-8555 Japan Center for Gravitational Physics and Quantum Information Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan Center for Particle Cosmology Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania 19104 USA Max Planck Institute für Astrophysik Karl-Schwarzschild-Straße 1 85748 Garching Germany National Astronomical Observatory of Japan National Institutes of Natural Sciences Mitaka Tokyo 181-8588 Japan The Institute of Statistical Mathematics Tachikawa Tokyo 190-8562 Japan

The baryonic feedback effect is considered as a possible solution to the so-called S8 tension indicated in cosmic shear cosmology. The baryonic effect is more significant on smaller scales, and it affects the cosmic shear two-point correlation functions (2PCFs) with different scale and redshift dependencies from those of the cosmological parameters. In this paper, we use the Hyper Suprime-Cam Year 3 (HSC-Y3) data to measure the cosmic shear 2PCFs (ξ±) down to 0.28 arcminutes, taking full advantage of the high number density of source galaxies in the deep HSC data, to explore a possible signature of the baryonic effect. While the published HSC analysis used the cosmic shear 2PCFs on the angular scales that are sensitive to the matter power spectrum at k≲1 h Mpc−1, the smaller-scale HSC cosmic shear signal allows us to probe the signature of the matter power spectrum up to k≃20 h Mpc−1. Using the accurate emulator of the nonlinear matter power spectrum, darkemulator2, we show that the dark-matter-only model can provide an acceptable fit to the HSC-Y3 2PCFs down to the smallest scales. In other words, we do not find any clear signature of the baryonic effects, or we do not find a systematic shift in the S8 value with the inclusion of the smaller-scale information as would be expected if the baryonic effect were significant. Alternatively, we use a flexible six-parameter model of the baryonic effects, which can lead to both enhancement and suppression in the matter power spectrum compared to the dark-matter-only model, to perform the parameter inference of the HSC-Y3 2PCFs. We find that the small-scale HSC data allow only a fractional suppression of up to 5% in the matter power spectrum at k∼1 h Mpc−1, which is not sufficient to reconcile the S8 tension. Finally, we discuss that ξ− on scales smaller than a few arcminutes can be used to monitor characteristic features caused by the baryonic effect if present, while ξ± with appropriate scale cuts can be used to constra

关键词：

来源：评论

学校读者我要写书评

暂无评论

Conformal invariant cosmological perturbations via the covariant approach:multicomponent universe

引用

Chinese physics C 2018年第3期42卷 94-101页

作者：郑云龙牟一岑饶浩民李明哲 Department of Physics Nanjing University Joint Center for Particle Nuclear Physics and Cosmology Interdisciplinary Center for Theoretical Study University of Science and Technology of China

In recent years there has been a lot of interest in discussing frame depeudences/independences of the cosmological perturbations under the conforlnal transformations. This problem has previously been investigated in Lerlns of the cow^riant approach for a single component universe, and it was found that tile covariant approach is very powerful to pick out the perturbative variables which are both gauge and conformal invariant. In this work, we extend the covariant approach to a universe with multicomponent fluids. We find that similar results can be derived, as e, xpected. In addition, some other interesting perturbations are also identified to be conformal invariant, such as entropy perturbation between two different components.

关键词： cosmological perturbations conformal transformation covariant approach

来源：评论

学校读者我要写书评

暂无评论

Direct couplings of mimetic dark matter and their cosmological effects

引用

Chinese physics C 2018年第1期42卷 145-150页

作者：沈浏源牟一岑郑云龙李明哲 Department of Physics Nanjing University Joint Center for Particle Nuclear Physics and Cosmology Interdisciplinary Center for Theoretical Study University of Science and Technology of China

The original mimetic model was proposed to take the role of dark matter. In this paper we consider possible direct interactions of mimetic dark matter with other matter in the universe, especially standard model particles such as baryons and photons. By imposing shift symmetry, the mimetic dark matter field can only have derivative couplings. We discuss the possibilities of generating baryon number asymmetry and cosmic birefringence in the universe based on the derivative couplings of mimetic dark matter to baryons and photons.

关键词： cosmology dark matter baryogenesis cosmological CPT violation

来源：评论

学校读者我要写书评

暂无评论

Model-independent H0 within FLRW: Joint constraints from GWTC-3 standard sirens and strong lensing time delays

arXiv

引用

arXiv 2025年

作者： Song, Ji-Yu Qi, Jing-Zhao Zhang, Jing-Fei Zhang, Xin Key Laboratory of Cosmology and Astrophysics Department of Physics College of Sciences Northeastern University Liaoning Province Shenyang110819 China Key Laboratory of Data Analytics and Optimization for Smart Industry Ministry of Education Northeastern University Shenyang110819 China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China

The Hubble tension has emerged as a critical crisis in cosmology, with the cause remaining unclear. Determining the Hubble constant (H0) independently of cosmological models and distance ladders will help resolve this crisis. In this letter, we for the first time use 47 gravitational-wave (GW) standard sirens from the third Gravitational-Wave Transient Catalog to calibrate distances in the strong lensing system, RXJ1131-1231, and constrain H0 through the distance-sum rule, with minimal cosmological assumptions. We assume that light propagation over long distances is described by the Friedmann-Lemaitre-Robertson-Walker metric and that geometrical optics holds, but we do not need to assume the universe’s contents or the theory of gravity on cosmological scales. Fixing ΩK = 0, we obtain H0 = 73.22+5−5.9543 km s−1 Mpc−1 and H0 = 70.40+8−5.0360 km s−1 Mpc−1 by using the deflector galaxy’s mass model and kinematic measurements to break mass-sheet transform, respectively. When ΩK is not fixed, the central value of H0 increases further. We find that our results are still dominated by statistical errors, and at the same time, we notice the great potential of using GW dark sirens to provide calibration, owing to their higher redshifts. When using 42 binary black holes and RXJ1131-1231, we obtain a 8.46% H0 constraint precision, which is better than that from the bright siren GW170817 using the Hubble law by about 40%. In the future, as the redshift range of GW dark sirens increases, more and more SGLTDs can be included, and we can achieve high-precision, model-independent measurements of H0 without the need for GW bright sirens. Copyright © 2025, The Authors. All rights reserved.

关键词： cosmology

来源：评论

学校读者我要写书评

暂无评论

Exploring entanglement and spectral split correlations in three-flavor collective neutrino oscillations

引用

Physical Review D 2025年第6期111卷 063038-063038页

作者： Pooja Siwach A. Baha Balantekin Amol V. Patwardhan Anna M. Suliga Nuclear and Chemical Science Division Lawrence Livermore National Laboratory Livermore California 94551 USA Department of Physics University of Wisconsin-Madison Madison Wisconsin 53706 USA Department of Physics New York Institute of Technology New York New York 10023 USA School of Physics and Astronomy University of Minnesota Minneapolis Minnesota 55455 USA Center for Cosmology and Particle Physics New York University New York New York 10003 USA Department of Physics University of California Berkeley Berkeley California 94720 USA Department of Physics University of California San Diego La Jolla California 92093-0319 USA

In environments with prodigious numbers of neutrinos, such as core-collapse supernovae, neutron star mergers, or the early Universe, neutrino-neutrino interactions are dynamically significant. They can dominate neutrino flavor evolution and force it to be nonlinear, causing collective neutrino oscillations. Such collective oscillations have been studied numerically, for systems with up to millions of neutrinos, using mean-field or one-particle effective approximations. However, such a system of interacting neutrinos is a quantum many-body system, wherein quantum correlations could play a significant role in the flavor evolution—thereby motivating the exploration of many-body treatments that follow the time evolution of these correlations. In many-body flavor evolution calculations with two neutrino flavors, the emergence of spectral splits in the neutrino energy distributions has been found to be correlated with the degree of quantum entanglement across the spectrum. In this work, for the first time, we investigate the emergence of spectral splits in the three-flavor many-body collective neutrino oscillations. We find that the emergence of spectral splits resembles the number and location found in the mean-field approximation but not in the width. Moreover, unlike in the two-flavor many-body calculations, we find that additional degrees of freedom make it more difficult to establish a correlation between the location of the spectral splits and the degree of quantum entanglement across the neutrino energy spectrum. The observation from the two-flavor case, that neutrinos nearest to the spectral split frequency exhibit the highest level of entanglement, is more difficult to ascertain in the three-flavor case because of the presence of multiple spectral splits across different pairwise combinations of flavor and/or mass states.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fragmentation functions of charged hadrons at next-to-next-to-leading order and constraints on proton PDFs

arXiv

引用

arXiv 2025年

作者： Gao, Jun Shen, XiaoMin Xing, Hongxi Zhao, Yuxiang Zhou, Bin INPAC Shanghai Key Laboratory for Particle Physics and Cosmology School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Shanghai200240 China Institute of Modern Physics Chinese Academy of Sciences Gansu Lanzhou730000 China Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Institute of Quantum Matter South China Normal University Guangzhou510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear Science Southern Nuclear Science Computing Center South China Normal University Guangzhou510006 China Institute of Modern Physics Chinese Academy of Sciences Huizhou516000 China University of Chinese Academy of Sciences Beijing100049 China Institute of Particle Physics Central China Normal University Wuhan430079 China

We present the first global analysis of fragmentation functions (FFs) for light charged hadrons (π±, K±) at full next-to-next-to-leading order in Quantum Chromodynamics (QCD), incorporating world data from both single-inclusive electron-positron annihilation and semi-inclusive deep-inelastic scattering. The collinear factorization has been tested with low-momentum-transfer data and has demonstrated success at high hadron momenta. Additionally, we perform a joint determination of both parton distribution functions (PDFs) and FFs. Our findings indicate that the current global data on hadron production favor a reduced asymmetry in the strange (anti-) quark PDFs, as compared to the asymmetry predicted by state-of-the-art PDFs derived from inclusive data. © 2025, CC0.

关键词： Positron annihilation

来源：评论

学校读者我要写书评

暂无评论

Modeling the BMS transformation induced by a binary black hole merger

arXiv

引用

arXiv 2025年

作者： Da Re, Guido Mitman, Keefe Stein, Leo C. Scheel, Mark A. Teukolsky, Saul A. Sun, Dongze Boyle, Michael Deppe, Nils Field, Scott E. Kidder, Lawrence E. Moxon, Jordan Nelli, Kyle C. Throwe, William Varma, Vijay Vu, Nils L. Theoretical Astrophysics 350-17 California Institute of Technology PasadenaCA91125 United States Cornell Center for Astrophysics and Planetary Science Cornell University IthacaNY14853 United States Department of Physics and Astronomy University of Mississippi UniversityMS38677 United States Laboratory for Elementary Particle Physics Cornell University IthacaNY14853 United States Department of Physics Cornell University IthacaNY14853 United States Department of Mathematics Center for Scientific Computing and Data Science Research University of Massachusetts DartmouthMA02747 United States

Understanding the characteristics of the remnant black hole formed in a binary black hole merger is crucial for conducting gravitational wave astronomy. Typically, models of remnant black holes provide information about their mass, spin, and kick velocity. However, other information related to the supertranslation symmetries of the BMS group, such as the memory effect, is also important for characterizing the final state of the system. In this work, we build a model of the BMS transformation that maps a binary black hole’s inspiral frame to the remnant black hole’s canonical rest frame. Training data for this model are created using high-precision numerical relativity simulations of quasi-circular systems with mass ratios q ≤ 8 and spins parallel to the orbital angular momentum with magnitudes χ1, χ2 ≤ 0.8. We use Gaussian Process Regression to model the BMS transformations over the three-dimensional parameter space (q, χz1, χz2). The physics captured by this model is strictly non-perturbative and cannot be obtained from post-Newtonian approximations alone, as it requires knowledge of the strong nonlinear effects that are sourced during the merger. Apart from providing the first model of the supertranslation induced by a binary black hole merger, we also find that the kick velocities predicted using Cauchy-characteristic evolution waveforms are, on average, ∼ 5% larger than the ones obtained from extrapolated waveforms. Our work has broad implications for improving gravitational wave models and studying the large-scale impact of memory, such as on the cosmological background. The fits produced in this work are available through the Python package surfinBH under the name NRSur3dq8BMSRemnant. © 2025, CC BY.

关键词： Relativity

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：