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Strong decays of the low-lying bottom strange baryons

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Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 51-57页

作者： Hui-Zhen He Wei Liang Qi-Fang Lü yu-bing dong Department of Physics Hunan Normal UniversityChangsha 410081China Synergetic Innovation Center for Quantum Effects and Applications(SICQEA) Changsha 410081China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Changsha 410081China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Theoretical Physics Center for Science Facilities(TPCSF) Chinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China

In this work,the strong decay behaviors of theλ-mode low-lyingΞ_(b) andΞ^(’)_(b) baryons are investigated within the 3 P0 *** results suggest that all of the low-lying 3F statesΞ_(b)(2 S),Ξ_(b)(1 P),andΞ_(b)(1 D)have small decay widths of less than 20 MeV,and these states have good potentials to be observed in theΞ^(’)_(b)πandΞ^(’)_(b)^(*)πinvariant ***,most of the 6F multiplets are relatively narrow and may decay into theΞ_(b)π,Ξ^(’)_(b)π,Ξ^(’)_(b)^(^(*))π,andΔbK final *** the masses and strong decay behaviors,we can assign the newly observedΞ_(b)(6100)resonance as theΞ_(b)(1 P)state with J^(P)=3/2-and interpret theΞ_(b)(6227)structure as the J^(P)=3/2-Ξ^(’)_(b)(1 P)state with a proper mixing *** expect that our predictions for these excited bottom strange baryons will provide helpful information for future experimental research.

关键词： bottom strange baryons strong decays ^(3)P0 model

Understanding the structure of d~*(2380) in chiral quark model

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Science China(Physics,Mechanics & Astronomy) 2016年第2期59卷 40-48页

作者： Fei Huang Peng Nian Shen yu bing dong Zong Ye Zhang School of Physical Sciences University of Chinese Academy of Sciences Institute of High Energy Physics Chinese Academy of Sciences Theoretical Physics Center for Science Facilities Chinese Academy of Sciences College of Physics and Technology Guangxi Normal University

The structure and decay properties of d＊ have been detailedly investigated in both the chiral SU（3） quark model and the extended chiral SU（3） quark model that describe the energies of baryon ground states and the nucleon-nucleon （NN） scattering data satisfactorily. By performing a dynamical coupled-channels study of the system of △△ and hidden-color channel （CC） with quantum numbers l（JP） = 0（3^＋） in the framework of the resonating group method （RGM）, we find that the d＊ has a mass of about 2.38-2.42 GeV and a root-mean-square radius （RMS） of about 0.76-0.88 fm. The channel wave function is extracted by a projection of the RGM wave function onto the physical basis, and the fraction of CC component in the d＊ is found to be about 66%-68%, which indicates that the d＊ is a hexaquark-dominated exotic state. Based on this scenario the partial decay widths of d＊ → dπ^0π^0 and d＊ → dn^＋n^- are further explicitly evaluated and the total width is then obtained by use of the branching ratios extracted from the measured cross sections of other possible decay channels. Both the mass and the decay width of d＊ calculated in this work are compatible with the data （M ≈ 2380 MeV, F ≈ 70 MeV） reported by WASA-at-COSY Collaboration.

关键词： hexaquark state d*(2380) quark model hidden-color channel

The ■ tetraquark states and the structure of X(2239) observed by the BESⅢ collaboration

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Chinese Physics C 2020年第2期44卷 88-93页

作者： Qi-Fang Lü Kai-Lei Wang yu-bing dong Department of Physics Hunan Normal Universityand Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationChangsha 410081China Synergetic Innovation Center for Quantum Effects and Applications(SICQEA) Hunan Normal UniversityChangsha 410081China Department of Electronic Information and Physics Changzhi UniversityChangzhi 046011China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Theoretical Physics Center for Science Facilities(TPCSF) CASBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China

We investigate the mass spectrum of the ■ tetraquark states in the relativized quark *** solving the Schr?dinger-like equation with the relativized potential,the masses of S-and P-wave ■ tetraquarks are *** screening effects are also taken into *** is found that the resonant structureX（2239）observed in thee+e-→K+K-process by the BESIII collaboration can be assigned as a P-wave 1--■ tetraquark ***,the radiative transition and the strong decay behavior of this structure are also estimated,which can provide helpful information for future experimental searches.

关键词： tetraquark spectrum radiative and strong decays relativized quark model

Production of d_(NΩ)dibaryon in kaon induced reactions

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Chinese Physics C 2023年第5期47卷 132-138页

作者：刘静吕齐放刘春华陈殿勇董宇兵 School of Physics Southeast UniversityNanjing 210094China Department of Physics Hunan Normal Universityand Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationChangsha 410081China Synergetic Innovation Center for Quantum Effects and Applications(SICQEA) Hunan Normal UniversityChangsha 410081China Research Center for Nuclear Physics(RCNP) IbarakiOsaka 567-0047Japan Lanzhou Center for Theoretical Physics Lanzhou UniversityLanzhou 730000China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China

In this paper,we propose to investigate the d_(NΩ)dibaryon production in the K-p-→d_(NΩ)≡0 process by utilizing a kaon beam with a typical momentum of approximately 10 GeV,which may be available at COMPASS,OKA@U-70,and SPS@*** cross sections for K-p-→d_(NΩ)=O are estimated,and in particular,the magnitude of the cross sections is evaluated to be several hundred nanobarns at Pk=20 *** that the d_(NΩ)dibaryon dominantly decays into≡Λand≡∑,we also estimate the cross sections for K-p→≡0Λ≡0 and K~p→≡-∑+≡0,where the d_(NΩ)dibaryon can be observed in the invariant mass distributions of≡0Λand≡-∑+,respectively.

关键词： dibaryon production process Kaon induced reaction

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半卷圆弯曲自动卸料模

模具工业 2007年第3期33卷 32-34页

作者：喻东兵王雁湖南常德纺织机械有限公司湖南常德415004 合肥工业大学机械与汽车工程学院安徽合肥230009

介绍半卷圆、压U形弯曲、自动卸料3个工作模块,分析三部分复合动作的工作过程、结构特点及设计要点。通过复合成形,简化工序,提高零件质量的稳定性,自动卸料的成功应用避免了手工操作的危险性,提高了工作效率,同时该机构对类似滞留在凸... 详细信息

介绍半卷圆、压U形弯曲、自动卸料3个工作模块,分析三部分复合动作的工作过程、结构特点及设计要点。通过复合成形,简化工序,提高零件质量的稳定性,自动卸料的成功应用避免了手工操作的危险性,提高了工作效率,同时该机构对类似滞留在凸模零件的卸料有借鉴作用。

关键词：半卷圆压弯模摆块自动卸料

Light meson emissions of selected charmonium-like states within compact tetraquark configurations

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Chinese Physics C 2023年第6期47卷 5-14页

作者：李宁何惠珍梁唯吕齐放陈殿勇董宇兵 Department of Physics Hunan Normal UniversityKey Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationChangsha 410081China Key Laboratory for Matter Microstructure and Function of Hunan Province Hunan Normal UniversityChangsha 410081China School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China Research Center for Nuclear Physics(RCNP) IbarakiOsaka 567-0047Japan School of Physics Southeast UniversityNanjing 210094China Lanzhou Center for Theoretical Physics Lanzhou UniversityLanzhou 730000China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Theoretical Physics Center for Science Facilities(TPCSF) Chinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China

We adopt the quark pair creation model to investigate the light meson emissions of several charmoniumlike *** quark pair creation model is applied to four-body systems,and we calculate the pion/kaon emissions of X(4700),Z_(c)(4430),Y(4230),Y(4360),Y(4390),and Y(4660)within compact tetraquark *** find that the pion/kaon decay widths of X(4700)and Z_(c)(4430)the resonances Y(4230),Y(4360),Y(4390),and Y(4660)cay behaviors will provide useful information for future experimental searches and theoretical interpretations.

关键词： charmonium-like states light meson emissions compact tetraquarks strong decays quark pair creation model

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银川市郊蔬菜温棚作业者泌尿生殖系统健康现况调查

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环境与职业医学 2017年第6期34卷 521-526页

作者：植小玉吴冰董立军赵吉杨惠芳宁夏医科大学公共卫生与管理学院宁夏回族自治区银川750004 宁夏国龙医院办公室宁夏回族自治区银川750004

[目的]了解银川市郊蔬菜温棚作业者泌尿生殖系统健康现状,并分析其影响因素。[方法]采用随机整群抽样法,于2015年4—5月采用问卷调查的方式,收集银川市三区两县460名蔬菜温棚作业者的相关信息,运用logistic回归分析作业者泌尿生殖系统... 详细信息

[目的]了解银川市郊蔬菜温棚作业者泌尿生殖系统健康现状,并分析其影响因素。[方法]采用随机整群抽样法,于2015年4—5月采用问卷调查的方式,收集银川市三区两县460名蔬菜温棚作业者的相关信息,运用logistic回归分析作业者泌尿生殖系统健康现况的影响因素。[结果]本次研究最终调查对象448名,问卷回收率97.4%,其中女性207人,男性241人。女性泌尿生殖系统疾病患病率高达75.8%,多因素分析结果显示:随意增加喷药次数(OR=3.683,95%CI:1.261~10.760)、喷药时闲聊(OR=2.532,95%CI:1.056~6.068)是影响其患病率的危险因素;使用阿维菌素(OR=0.311,95%CI:0.132~0.730)是保护因素。男性泌尿生殖系统疾病患病率为14.1%,多因素分析结果显示:年龄大(OR=1.048,95%CI:1.007~1.091)、农药的暴露分级高(OR=5.11,95%CI:1.313~19.890)、混配农药的种类多(OR=3.275,95%CI:1.186~9.042)及混配农药使用所占的比例高(OR=3.243,95%CI:1.056~9.959)是影响其患病率的危险因素;每周食用肉类次数多(OR=0.697,95%CI:0.491~0.989)是保护因素。[结论]银川市郊女性温棚作业者泌尿生殖系统疾病发病率较高,缺乏农药的正确使用及防护知识是影响该类疾病的主要影响因素。

关键词：温棚作业者泌尿生殖系统患病率农药暴露农药防护

Enhanced solid-electrolyte interface efficiency for practically viable hydrogen-air fuel cell systems

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Journal of Energy Chemistry 2025年第1期100卷 356-368页

作者： Venkitesan Sakthivel dong Jin Yoo Graduate School Department of Energy Storage/Conversion Engineering (BK21 FOUR) Hydrogen and Fuel Cell Research Center Jeonbuk National University Jeonju Department of Life Science Jeonbuk National University

Proton exchange membrane fuel cells （PEMFCs） provide an appealing sustainable energy system,with the solid-electrolyte membrane playing a crucial role in its overall ***,sulfonated poly（1,4-phenylene ether-ether sulfone）(SPEES),an aromatic hydrocarbon polymer,has garnered considerable attention as an alternative to Nafion ***,the long-term durability and stability of SPEES present a significant *** this context,we introduce a potential solution in the form of an additive,specifically a core–shell-based amine-functionalized iron titanate （A–Fe2TiO5）,which holds promise for improving the lifetime,proton conductivity,and power density of SPEES in *** modified SPEES/A–Fe2TiO5composite membranes exhibited notable characteristics,including high water uptake,enhanced thermomechanical stability,and oxidative ***,the SPEES membrane loaded with 1.2 wt%of A–Fe2TiO5demonstrates a maximum proton conductivity of 155 mS cm-1,a twofold increase compared to the SPEES membrane,at 80°C under 100%relative humidity （RH）.Furthermore,the 1.2 wt%of A–Fe2TiO5/SPEES composite membranes exhibited a maximum power density of 397.37 mW cm-2and a current density of 1148 mA cm-2at 60°C under 100%RH,with an opencircuit voltage decay of 0.05 m V/h during 103 h of continuous *** study offers significant insights into the development and understanding of innovative SPEES nanocomposite membranes for PEMFC applications.

关键词： Acid-base Hybrid membrane Proton conductivity Polymer electrolyte fuel cell Single-cell performance

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海底子母管作用下海床冲刷的试验研究

中国海洋大学学报（自然科学版） 2017年第11期47卷 109-116页

作者：潘新颖赵恩金拾兵于冬黄修筠中国海洋大学工程学院山东青岛266100

子母管作为海洋工程中的新型管线结构,越来越受到重视。本文运用物理试验的方法研究了稳定流中海底子母管对海床局部冲刷的影响。通过控制不同海底子母管间间距,管径及来流流速,分析出了两管间隙比对冲刷坑内冲刷深度的影响,同时,从泥... 详细信息

子母管作为海洋工程中的新型管线结构,越来越受到重视。本文运用物理试验的方法研究了稳定流中海底子母管对海床局部冲刷的影响。通过控制不同海底子母管间间距,管径及来流流速,分析出了两管间隙比对冲刷坑内冲刷深度的影响,同时,从泥沙起动原理出发,利用流体的连续性特征,推导了与子母管间间隙比、管径及来流流速相关的冲刷坑深度理论公式,该理论公式与试验结果吻合良好,可预测子母管下泥沙的冲刷。通过试验可知,雷诺数及子母管间间隙对冲刷坑深度有较大的影响。在一定雷诺数下,子母管间间隙越小,冲刷坑深度越大,泥沙输移越也越严重。在管线间间隙比不变时,雷诺数增加同样能加强管线下方冲刷。

关键词：子母管线冲刷深度海流冲刷机理试验研究