arXiv - PHYS - High Energy Physics - Theory最新文献_第7页

A Note on 4d Kination and Higher-Dimensional Uplifts 关于 4d Kination 和更高维度提升的说明

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.08049

Fien Apers, Joseph P. Conlon, Martin Mosny

引用次数: 0

Constraints on the Primordial Black Hole Abundance through Scalar-Induced Gravitational Waves from Advanced LIGO and Virgo's First Three Observing Runs 通过高级 LIGO 和处女座前三次观测运行产生的标量诱发引力波对原始黑洞丰度的约束

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.07976

Yang Jiang, Chen Yuan, Chong-Zhi Li, Qing-Guo Huang

{"title":"Constraints on the Primordial Black Hole Abundance through Scalar-Induced Gravitational Waves from Advanced LIGO and Virgo's First Three Observing Runs","authors":"Yang Jiang, Chen Yuan, Chong-Zhi Li, Qing-Guo Huang","doi":"arxiv-2409.07976","DOIUrl":"https://doi.org/arxiv-2409.07976","url":null,"abstract":"As a promising dark matter candidate, primordial black holes (PBHs) lighter\u0000than $sim10^{-18}M_{odot}$ are supposed to have evaporated by today through\u0000Hawking radiation. This scenario is challenged by the memory burden effect,\u0000which suggests that the evaporation of black holes may slow down significantly\u0000after they have emitted about half of their initial mass. We explore the\u0000astrophysical implications of the memory burden effect on the PBH abundance by\u0000today and the possibility for PBHs lighter than $sim10^{-18}M_{odot}$ to\u0000persist as dark matter. Our analysis utilizes current LIGO-Virgo-KAGRA data to\u0000constrain the primordial power spectrum and infers the PBH abundance. We find a\u0000null detection of scalar-induced gravitational waves that accompanied the\u0000formation of the PBHs. Then we place an upper limit on the primordial power\u0000spectrum and the PBH abundance to be $f_{mathrm{pbh}}simeq0.3$ for PBHs with\u0000masses $sim10^{-24}M_{odot}$. Furthermore, we expect that next-generation\u0000gravitational wave detectors, such as the Einstein Telescope and the Cosmic\u0000Explorer, will provide even more stringent constraints. Our results indicate\u0000that future detectors can reach sensitivities that could rule out PBH as dark\u0000matter within $sim[10^{-29}M_{odot},10^{-19}M_{odot}]$ in the null detection\u0000of scalar-induced gravitational waves.","PeriodicalId":501339,"journal":{"name":"arXiv - PHYS - High Energy Physics - Theory","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gravastars as Nontopological Solitons 作为非拓扑孤子的引力星

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.07818

Tatsuya Ogawa, Hideki Ishihara

引用次数: 0

Probing Quantum Gravity Effects with Eccentric Extreme Mass-Ratio Inspirals 用偏心极高质量数激发器探测量子引力效应

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.08138

Guoyang Fu, Yunqi Liu, Bin Wang, Jian-Pin Wu, Chao Zhang

引用次数: 0

Black Hole Evaporation Process and Tangherlini-Reissner-Nordström Black Holes Shadow 黑洞蒸发过程与唐格里尼-赖斯纳-诺德斯特伦黑洞阴影

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.07951

Balendra Pratap Singh

{"title":"Black Hole Evaporation Process and Tangherlini-Reissner-Nordström Black Holes Shadow","authors":"Balendra Pratap Singh","doi":"arxiv-2409.07951","DOIUrl":"https://doi.org/arxiv-2409.07951","url":null,"abstract":"In this article, we study the black hole evaporation process and shadow\u0000property of the Tangherlini-Reissner-Nordstr\"om (TRN) black holes. The TRN\u0000black holes are the higher-dimensional extension of the Reissner-Nordstr\"om\u0000(RN) black holes and are characterized by their mass $M$, charge $q$, and\u0000spacetime dimensions $D$. In higher-dimensional spacetime, the black hole\u0000evaporation occurs rapidly, causing the black hole's horizon to shrink. We\u0000derive the rate of mass loss for the higher-dimensional charged black hole and\u0000investigate the effect of higher-dimensional spacetime on charged black hole\u0000shadow. We derive the complete geodesic equations of motion with the effect of\u0000spacetime dimensions $D$. We determine impact parameters by maximizing the\u0000black hole's effective potential and estimate the critical radius of photon\u0000orbits. The photon orbits around the black hole shrink with the effect of the\u0000increasing number of spacetime dimensions. To visualize the shadows of the\u0000black hole, we derive the celestial coordinates in terms of the black hole\u0000parameters. We use the observed results of M87 and Sgr A$^{*}$ black hole from\u0000the Event Horizon Telescope and estimate the angular diameter of the charge\u0000black hole shadow in the higher-dimensional spacetime. We also estimate the\u0000energy emission rate of the black hole. Our finding shows that the angular\u0000diameter of the black hole shadow decreases with the increasing number of\u0000spacetime dimensions $D$.","PeriodicalId":501339,"journal":{"name":"arXiv - PHYS - High Energy Physics - Theory","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mass hierarchies in gauge theory with two index symmetric representation matter 具有双指数对称表征物质的规规理论中的质量分层

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.07977

Anja Alfano, Nick Evans

{"title":"Mass hierarchies in gauge theory with two index symmetric representation matter","authors":"Anja Alfano, Nick Evans","doi":"arxiv-2409.07977","DOIUrl":"https://doi.org/arxiv-2409.07977","url":null,"abstract":"In gauge theories, the running of the anomalous dimension of a fermion\u0000bilinear operator is believed to lead to chiral symmetry breaking when gamma=1.\u0000Naively using perturbative results to judge when gamma=1 leads to the\u0000possibility of large dynamically generated mass hierarchies in models with both\u0000two index symmetric representation and fundamental representation fermions. In\u0000this paper we study a holographic model of this physics to predict the\u0000separation in scales in the meson spectrum. We study SU(Nc) theories at\u0000different Nc with one flavour of two index symmetric representation as a\u0000function of the number of fundamental fermion flavours NfF. The largest\u0000hierarchy we find is for Nc=7 and NfF=22 where the rho mesons made of the two\u0000different representations are separated in scale by a factor of 13. For general\u0000Nc the hierarchy can be made greater than 7 by tuning NfF. We display the\u0000hierarchy as a function of NfF and investigate the quark mass dependence. These\u0000predictions do depend on the extrapolation of gamma from the perturbative\u0000regime - even in a pessimistic scenario a distinct gap can be achieved.","PeriodicalId":501339,"journal":{"name":"arXiv - PHYS - High Energy Physics - Theory","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Note on explicit construction of conformal generators on the fuzzy sphere 关于在模糊球面上明确构建共形发电机的说明

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.08257

Ruihua Fan

引用次数: 0

A Procedure g5anchor to Anchor $γ_5$ in Feynman Diagrams for the Standard Model 在标准模型费曼图中锚定 $γ_5$ 的程序 g5anchor

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.08099

Long Chen

{"title":"A Procedure g5anchor to Anchor $γ_5$ in Feynman Diagrams for the Standard Model","authors":"Long Chen","doi":"arxiv-2409.08099","DOIUrl":"https://doi.org/arxiv-2409.08099","url":null,"abstract":"We present a procedure g5anchor to anchor $gamma_5$ in the definition of a\u0000Dirac trace with $gamma_5$ in Dimensional Regularization (DR) in Feynman\u0000diagrams for the Standard Model, based on a recent revision of the works by\u0000Kreimer, Gottlieb and Donohue. For each closed fermion chain with an odd number\u0000of primitive (i.e.~not-yet-clearly-defined) $gamma_5$ in a given Feynman\u0000diagram, g5anchor returns a definite set of anchor points for $gamma_5$, in\u0000terms of pairs of ordered fermion propagators; at each of these $gamma_5$\u0000anchor points a fixed expression in terms of the Levi-Civita tensor and\u0000elementary Dirac matrices will be inserted together with a sign determined by\u0000anticommutatively shifting all $gamma_5$ from their original places (dictated\u0000by the Feynman rules) to this anchor point. The defining expressions for the\u0000cyclic $gamma_5$-odd Dirac traces in DR associated with closed fermion chains\u0000in amplitudes, or more generally squared amplitudes, thus follow from this\u0000procedure, where the Levi-Civita tensors are not necessarily treated strictly\u0000in 4-dimensions. We propose utilizing this definition in practical perturbative\u0000calculations in the Standard Model at least to three-loop orders with the\u0000current implementation, and maybe to higher loop orders in absence of Yukawa\u0000couplings to Higgs fields. Certain limitations and modifications of the KKS\u0000and/or the Kreimer scheme are addressed.","PeriodicalId":501339,"journal":{"name":"arXiv - PHYS - High Energy Physics - Theory","volume":"384 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Skyrmion crystal phase on a magnetic domain wall in chiral magnets 手性磁体磁畴壁上的 Skyrmion 晶体相

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.07943

Yuki Amari, Muneto Nitta

引用次数: 0

Scalar induced gravitational waves in f(R) gravity f(R) 引力中的标量诱导引力波

arXiv - PHYS - High Energy Physics - Theory Pub Date : 2024-09-12 DOI: arxiv-2409.07702

Jing-Zhi Zhou, Yu-Ting Kuang, Di Wu, Fei-Yu Chen, H. Lü, Zhe Chang

引用次数: 0