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Analysis of Z_(cs)(3985)as the axialvector tetraquark state

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Chinese Physics C 2021年第7期45卷 82-90页

作者：王志刚 Department of Physics North China Electric Power UniversityBaoding 071003China

In this study,we choose the scalar and axialvector diquark operators in the color antitriplet as the fundamental building blocks to construct four-quark currents and investigate the diquark-antidiquark type axialvector tetraquark states ccus in the framework of the QCD sum *** predicted tetraquark massM_(Z)=3.99±0.09GeV is in excellent agreement with the experimental value 3985.2^(+2.1)_(-2.0)±1.7 MeV from the BESⅢ collaboration,which supports identifying Z_{cs}(3985) as the cousin of Z_(c)(3900) with quantum numbers J^(PC)=1^(+-).We take into account the light flavor SU(3) mass-breaking effect to estimate the mass spectrum of the diquark-antidiquark type hidden-charm tetraquark states with strangeness according to previous studies.

关键词： tetraquark state QCD sum rules XYZ particles

Tetraquark candidates in LHCb's di-J/ψ mass spectrum

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Chinese Physics C 2020年第11期44卷 79-85页

作者：王志刚 Department of Physics North China Electric Power UniversityBaoding 071003China

In this article,we study the first radial excited states of the scalar,axialvector,vector,and tensor diquark-antidiquark-type cccc tetraquark states with the QCD sum rules and obtain the masses and pole residues;then,we use the Regge trajectories to obtain the masses of the second radial excited *** predicted masses support assigning the broad structure from 6.2 to 6.8 GeV in the di-J/ψ mass spectrum to be the first radial excited state of the scalar,axialvector,vector,or tensor cccc tetraquark state,as well as assigning the narrow structure at about 6.9 GeV in the di-J/ψ mass spectrum to be the second radial excited state of the scalar or axialvector cccc tetraquark state.

关键词： tetraquark states QCD sum rules

Scalar or Vector Tetraquark State Candidate: Z_c(4100)

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Communications in Theoretical Physics 2019年第11期71卷 1319-1327页

作者：王志刚 Department of Physics North China Electric Power University

In this article, we separate the vector and axialvector components of the tensor diquark operators explicitly,construct the axialvector-axialvector type and vector-vector type scalar tetraquark currents and scalar-tensor type tensor tetraquark current to study the scalar, vector and axialvector tetraquark states with the QCD sum rules in a consistent way. The present calculations do not favor assigning the Zc(4100) to be a scalar or vector tetraquark state. If the Zc(4100) is a scalar tetraquark state without mixing effects, it should have a mass about 3.9 GeV or 4.0 GeV rather than4.1 GeV;on the other hand, if the Zc(4100) is a vector tetraquark state, it should have a mass about 4.2 GeV rather than 4.1 GeV. However, if we introduce mixing, a mixing scalar tetraquark state can have a mass about 4.1 GeV. As a byproduct, we obtain an axialvector tetraquark candidate for the Zc(4020).

关键词： Tetraquark state QCD sum rules

Axialvector tetraquark candidates for Zc(3900), Zc(4020),Zc(4430), and Zc(4600)

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Chinese Physics C 2020年第6期44卷 45-54页

作者：王志刚 Department of Physics North China Electric Power UniversityBaoding 071003China

We construct the axialvector and tensor current operators to systematically investigate the ground and first radially excited tetraquark states with quantum numbers J^PC= 1^+-using the QCD sum rules. We observe one axialvector tetraquark candidate for Zc(3900) and Zc(4430), two axialvector tetraquark candidates for the Zc(4020), and three axialvector tetraquark candidates for Zc(4600).

关键词： tetraquark state QCD sum rules

Modeling analysis of cobalt-based Fischer-Tropsch catalyst particles

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Chinese Journal of Chemical Engineering 2024年第6期70卷 82-92页

作者： Huashuai Wu gang wang Yong Yang Yongwang Li College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China National Energy Research&Development Center for Coal to Liquid Fuels Synfuels China CompanyLimitedBeijing 101400China

The influences of particle size,shape,and catalyst distribution on the reactivity and hydrocarbon product selectivity of a cobalt-based catalyst for Fischer-Tropsch synthesis were investigated in the present work.A self-consistent kinetic model for Fischer-Tropsch reaction proposed here was found to correlate experimental data well and hence was used to describe the consumption rates of reactants and formation rates of hydrocarbon *** perturbed-chain statistical associating fluid theory equation of state was used to describe vapor-liquid equilibrium behavior associated with Fischer-Tropsch *** interaction between intraparticle diffusion and Fischer-Tropsch reaction was investigated in *** showed that in order to avoid the adverse influence of intraparticle diffusional limitations on catalyst reactivity and product selectivity,the use of small particles is *** eggshell spherical particles are shown to keep the original catalyst reactivity and enhance the selectivity of heavy hydrocarbon *** suitable layer thickness for a spherical particle with a diameter of 2 mm is nearly 0.15 *** the same outer diameter of 2 mm,the catalyst reactivity and heavy product selectivity of hollow cylindrical particles with a layer thickness of 0.25 mm are found to be larger than eggshell spherical *** the viewpoint of catalytic performance,hollow cylindrical particles are a better choice for industrial applications.

关键词： Fischer-Tropsch synthesis Kinetic modeling Vapor-liquid equilibria Numerical simulation Intraparticle diffusion Particle shapes

Highly efficient 1D p-Te/2D n-Bi_(2)Te_(3) heterojunction self-driven broadband photodetector

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Nano Research 2024年第3期17卷 1864-1874页

作者： Chenchen Zhao Dongbo wang Jiamu Cao zhi Zeng Bingke Zhang Jingwen Pan Donghao Liu Sihang Liu Shujie Jiao Tianyuan Chen gang Liu Xuan Fang Liancheng Zhao Jinzhong wang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Astronautics Harbin Institute of TechnologyHarbin 150001China Center for High Pressure Science and Technology Advanced Research Shanghai 201203China State Key Laboratory of High Power Semiconductor Lasers Changchun University of Science and TechnologyChangchun 130022China

Broadband photodetectors with self-driven functions have attracted intensive scientific interest due to their low energy consumption and high optical ***,high-performance broadband self-driven photodetectors are still a significant challenge due to the complex fabrication processes,environmental toxicity,high production costs of traditional 3D semiconductor materials and sharply raised contact resistance,severe interfacial recombination of 2D materials and 2D/3D mixed dimension ***,1D p-Te/2D n-Bi_(2)Te_(3) heterojunctions are constructed by the simple and low-cost hydrothermal method.1D p-Te/2D n-Bi_(2)Te_(3) devices are applied in photoelectrochemical(PEC)photodetectors,with their high performance attributed to the good interfacial contacts reducing interface *** device demonstrated a broad wavelength range(365–850 nm)with an Iph/Idark as high as *** R_(i),D^(*),and external quantum efficiency(EQE)values of the device were as high as 12.07 mA/W,5.87×10^(10) Jones,and 41.05%,respectively,which were significantly better than the performance of the prepared Bi_(2)Te_(3) and Te devices.A comparison of the freshly fabricated device and the device after 30 days showed that 1D p-Te/2D n-Bi_(2)Te_(3) had excellent stability with only 18.08%decay of *** is anticipated that this work will provide new emerging material for future design and preparation of a high-performance self-driven broadband photodetector.

关键词： topological insulating states interfacial recombination self-driven 1D p-Te/2D n-Bi_(2)Te_(3) photodetector

Endometrial Carcinoma Arising in Didelphic Uterus Accompanied by Right Renal Agenesis： A Case Report

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Chinese Medical Sciences Journal 2016年第3期31卷 200-202页

作者： zhi-qiang wang zhi-gang wang Pan Li Hong-bing Cai Department of Gynecological Oncology Zhongnan Hospital Wuhan University Wuhan 430071 China Department of Cardiothoracic Surgery Nanjing Drum Tower Hospital Medical School of Nanjing University Nanjing 210008 China

MüLLERIAN duct anomalies(MDA)are abnormalities occurring in the müllerian duct due to abnormal development of the uterus,cervix and *** prevalence of this malformation in general population was 4%-5%.But real figure may be greater because of unawareness of these diseases due to its asymptomatic nature.~1Bicornuate and didelphic uteri are two common

关键词：子宫内膜癌发育不全发育异常肾 MDA 子宫颈总人口疾病

A Local Tb Theorem for Square Functions and Parabolic Layer Potentials

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数学学报（英文版） 2024年第8期40卷 1941-1966页

作者： zhi Dan wang Guo Ming ZHANG School of Physical and Mathematical Sciences Nanjing Tech UniversityNanjing 211816P.R.China Frontiers Science Center for Nonlinear Expectations Ministry of EductionResearch Center for Mathematics and Interdisciplinary SciencesShandong UniversityQingdao266237P.R.China

In this paper,we give a locally parabolic version of Tb theorem for a class of vector-valued operators with off-diagonal decay in L2 and certain quasi-orthogonality on a subspace of L2,in which the testing functions themselves are also *** an application,we establish the boundedness of layer potentials related to parabolic operators in divergence form,defined in the upper half-space Rn+2+:={(x,t,λ)∈ Rn+1 ×(0,∞)},with uniformly complex elliptic,L∞,t,λ-independent coefficients,and satisfying the De Giorgi/Nash estimates.

关键词： 35A99 Calderón-Littlewood-Paley family Carleson measure estimates Local Tb theorems Parabolic layer potentials

Diffraction limit of light in curved space

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Photonics Research 2024年第2期12卷 235-243页

作者： JINGXUAN ZHANG CHENNI XU PATRICK SEBBAH LI-gang wang School of Physics Zhejiang UniversityHangzhou 310058China Department of Physics The Jack and Pearl Resnick Institute for Advanced TechnologyBar-Ilan UniversityRamat-Gan 5290002Israel

Overcoming the diffraction limit is crucial for obtaining high-resolution images and observing fine *** this conventional difficulty still puzzling us and the prosperous development of wave dynamics of light interacting with gravitational fields in recent years,how spatial curvature affects the diffraction limit is an attractive and important *** we investigate the issue of the diffraction limit and optical resolution on two-dimensional curved space—surfaces of revolution(SORs)with constant or variable spatial *** show that the diffraction limit decreases and the resolution is improved on SORs with positive Gaussian curvature,opening a new avenue to *** diffraction limit is also influenced by the propagation direction,as well as the propagation distance in curved space with variable spatial *** results provide a possible method to control the optical resolution in curved space or equivalent waveguides with varying refractive index distribution and may allow one to detect the presence of the nonuniform strong gravitational effect by probing locally the optical resolution.

关键词： limit curved curvature