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Vector meson effects on multi-Skyrmion states from the rational map ansatz

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Science China(Physics,Mechanics & Astronomy) 2023年第11期66卷 126-135页

作者： Jun-Shuai Wang yong-liang ma College of Physics Jilin UniversityChangchun130012China School of Fundamental Physics and mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences(UCAS)Hangzhou310024China TaiJi Laboratory for Gravitational Wave Universe(Beijing/Hangzhou) UCASBeijing100049China

The roles of the lightest vector mesons ρ and ω in the multi-Skyrmion states are studied using the hidden local symmetry approach up to the next-to-leading order,including the homogeneous Wess-Zumino *** low-energy constants in the effective field theory are determined using the Sakai-Sugimoto model and the flat-space five-dimensional Yang-Mills *** only two inputs,m_(ρ) and f_(π),it is possible to determine all low-energy constants without *** vector meson effects can be investigated by sequentially integrating vector mesons,and their geometry can be elucidated by comparing the results using the low-energy constants estimated from the Sakai-Sugimoto model and the flat-space five-dimensional Yang-Mills *** found that theρmeson reduces the masses of the multi-Skyrmion states and increases the overlaps of their constituents,whereas theωmeson repulses the constituents of the multi-Skyrmion states and increases their ***,these vector mesons are crucial in the Skyrme model approach to *** also found that the warping factor,an essential element in the holographic model of QCD,affects the properties of the multi-Skyrmion states and cannot be ignored.

关键词： vector meson multi-Skyrmion state rational map hidden local symmetry

Topological Dark matter from the Theory of Composite Electroweak Symmetry Breaking

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Communications in Theoretical Physics 2018年第10期70卷 439-444页

作者： Ping He yong-liang ma Center for Theoretical Physics and College of Physics Jilin UniversityChangchun 130012China

The lightest electroweak baryon as a topological object is investigated by using a general effective Lagrangian of composite electroweak symmetry breaking and the spin-independent electroweak baryon-nucleon scattering cross section is calculated. We explicitly show the masses of the electroweak baryons and the cross section as functions of the Peskin-Takeuchi S parameter and the ratio of the masses of axial-vector and vector composite bosons. We find that it is acceptable to regard the electroweak baryon as a dark matter candidate and the even number of technicolor is favored.

关键词： effective field theory skyrmion dark matter

Pseudoconformal equation of state in compact-star matter from topology change and hidden symmetries of QCD

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Science China(Physics,Mechanics & Astronomy) 2019年第11期62卷 87-92页

作者： yong-liang ma Hyun Kyu Lee Won-Gi Paeng mannque Rho Center for Theoretical Physics and College of Physics Jilin UniversityChangchun 130012China Department of Physics Hanyang UniversitySeoul 133-791Korea Rare Isotope Science Project Institute for Basic ScienceDaejeon 305-811Korea Institut de Physique Theorique CEA Saclay91191 Gif-sur-Yvette cedexFrance

We construct a new effective field theory approach to the equation of state(EoS), dubbed pseudo-confomal model 'PCM', for nuclear and compact star matter entirely in terms of effective hadron degrees of freedom. The possible transition at n ^(2-4)n0(where n0 is the normal nuclear matter density) from hadron degrees of freedom to strongly-coupled quark degrees of freedom,giving rise to a soft-to-hard changeover in the EoS that can accommodate the massive stars observed, is effectuated by the topology change at n1/2>~ 2n0 from skyrmions to half-skyrmions without involving local order-parameter fields. The mechanism exploits possible emergence of hidden scale and local symmetries of QCD at high density, leading to a precocious 'pseudo-conformal'sound velocity vs2= 1/3(in unit of c = 1) for n>~ 3n0. The resulting prediction signals a drastic departure from standard nuclear many-body theory in the density regime involved in the massive stars. We suggest that the tidal deformability implemented in gravitational waves coming from coalescing neutron stars in LIGO/Virgo-type observations could pin down the location of the topology change density n1/2.

关键词： equation of state compact star tidal deformability conformal sound velocity

Chiral effective Lagrangian for excited heavy-light mesons from QCD

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Communications in Theoretical Physics 2021年第6期73卷 94-101页

作者： Qing-Sen Chen Hui-Feng Fu yong-liang ma Qing Wang Center for Theoretical Physics College of PhysicsJilin UniversityChangchun 130012China School of Fundamental Physics and mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou310024China International Center for Theoretical Physics Asia-Pacific(ICTP-AP)(Beijing/Hangzhou) UCASBeijing 100190China Department of Physics Tsinghua UniversityBeijing 100084China Center for High Energy Physics Tsinghua UniversityBeijing 100084China

We derive the chiral effective Lagrangian for excited heavy-light mesons from QCD under proper *** focus on the chiral partners with j_(l)^(P)=3+/2 and j_(l)^(P)=3-/2 which amounts to(1^(+),2^(+))and(1^(-),2^(-))states *** low energy constants including the masses of the chiral partners are *** calculated spectrum for the excited mesons are found roughly consistent with experimental *** addition,our results indicate that quantum numbers of B_(J)(5970)can be identified with 1^(-)or 2^(-).

关键词： chiral effective Lagrangian heavy-light meson QCD chiral partner

Mechanical Properties and Microstructure of In Situ TiB_2-7055 Composites

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Chinese Journal of Aeronautics 2006年第B12期19卷 66-70页

作者： CHEN dong LE yong-kang BAI liang ma Nai-heng LI Xian-feng WANG Hao-wei The State Key laboratory of Metal matrix Composites Shanghai Jiao Tong University Shanghai 200030 China

In order to fabricate a kind of high strength particulate reinforced aluminum-matrix composites, the high strength aluminum alloy 7055 was selected as a matrix. Composites reinforced with varying amounts of TiB2 particles were synthesized using the in situ method, and their mechanical properties and microstructure were analyzed. It is found that the in situ TiB2 particles sized from 50 to 400 um uniformly disperse in the matrix. With the weight fraction of TiB2 particles increasing, the elastic modulus as well as the yield strength and the ultimate tensile strength increase, while the ductility decrease. The improvement of strength could be attributed to good bonding between TiB2 and the matrix, and also the TiB2 particles act as a barrier to dislocation.

关键词： metal matrix composite in situ mechanical properties microstructure

Multi-skyrmion states in the Skyrme model with a false vacuum potential

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Chinese Physics C 2023年第9期47卷 105-109页

作者：王俊帅马永亮 College of Physics Jilin UniversityChangchun 130012China School of Fundamental Physics and mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China

We study multi-skyrmion states using the Skyrme model with a false vacuum potential up to baryon number B=8 using the product ansatz. It is found that both the false and true vacuum potentials can result in a cluster structure for the multi-skyrmion states. We also analyze the effect of explicit chiral breaking on the masses and contour surfaces of the baryon number density of the multi-skyrmion states.

关键词： multi-skyrmion state false vacuum cluster structure

HIDDEN LOCAL SYMMETRY AND CHIRAL EFFECTIVE THEORY FOR VECTOR AND AXIAL-VECTOR MESONS

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HIDDEN LOCAL SYMMETRY AND CHIRAL EFFECTIVE THEORY FOR VECTOR...

Vector meson's spin alignments in high energy reactions

第九届全国粒子物理学术会议

作者： yong-liang ma Institute of Theoretical Physics,Academia Sinica,China

来源： cnki会议评论

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cnki会议

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 5-20页

作者： Jin-Hui Chen Zuo-Tang liang Yu-Gang ma Xin-Li Sheng Qun Wang Key Laboratory of Nuclear Physics and Ion-beam Application (MoE) Institute of Modern PhysicsFudan University Institute of Frontier and Interdisciplinary Science Key Laboratory of Particle Physics and Particle Irradiation (MOE)Shandong University INFN-Firenze Department of Modern Physics University of Science and Technology of China School of Mechanics and Physics Anhui University of Science and Technology

The global spin alignment of vector mesons has been observed by the STAR collaboration at the Relativistic Heavy Ion Collider （RHIC） at Brookhaven National Laboratory （BNL）.It provides a unique opportunity to probe the correlation between the polarized quark and antiquark in the strongly coupled quark-gluon plasma （sQGP） produced in relativistic heavy ion collisions,opening a new window to explore the properties of s *** addition,spin alignments of vector mesons have also been observed in other high-energy particle collisions such as e+e-annihilations at high energies where hadron production is dominated by quark fragmentation *** results obtained are quite different from those obtained in heavy ion collisions where quark coalescence/combination mechanism dominates suggesting strong dependence on hadronization *** comprehensive studies in different hadronization processes are *** this article,we present a brief review of theoretical and experimental advances in the study of vector meson’s spin alignments in a variety of high-energy particle collisions,with emphasis on hadronization mechanisms.

关键词： vector meson spin alignment global polarization relativistic heavy ion collisions fragmentation

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大型桥梁用液体黏滞阻尼器的耐久性研究

工程抗震与加固改造 2017年第1期39卷 109-115页

作者：陈永祁马良喆北京奇太振控科技发展有限公司北京100037

在大型桥梁上运行的液体黏滞阻尼器必须具有良好的耐久性和抗疲劳能力。耐久性指标是阻尼器性能的综合体现。本文从液体黏滞阻尼器的设计原理及生产工艺的技术要求出发,结合龙江大桥阻尼器的实施策略,对阻尼器的设计过程、技术关键、生... 详细信息

在大型桥梁上运行的液体黏滞阻尼器必须具有良好的耐久性和抗疲劳能力。耐久性指标是阻尼器性能的综合体现。本文从液体黏滞阻尼器的设计原理及生产工艺的技术要求出发,结合龙江大桥阻尼器的实施策略,对阻尼器的设计过程、技术关键、生产管理进行了讨论,并着重对阻尼装置的耐久性问题进行了剖析。本文可供阻尼器生产厂家参考,利于提高产品耐久性和使用年限,也可供结构工程师更多地认识阻尼器的构造原理以及生产过程,以便在设计分析工作中,进一步提高选用、布置既技术先进又经济合理的液体黏滞阻尼器。

关键词：黏滞阻尼器龙江大桥耐久性