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Resonant contribution of the three-body decay processB_(s)→K+K−P in perturbative QCD

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Chinese Physics C 2024年第1期48卷 29-39页

作者：吕刚张畅畅赵艳琳张丽英 College of Science Henan University of TechnologyZhengzhou 450001China

We investigate CP violation in the decay process B_(s)→ϕ(ρ,ω)P→K^(+)K^(-)P by considering the interference effects ofϕ→K^(+)K^(-),ρ→K^(+)K^(-),andω→K^(+)K^(-)within the framework of the perturbative QCD method(P refers toπ,K,η,andη′pseudoscalar mesons).We analyze the mixings ofϕ−ρ^(0),ϕ−ω,andω−ρ0 and provide the amplitudes of the quasi-two-body decay *** CP violation for the B_(s)→K^(+)K^(-)P decay process is obvious in the ranges of the three vector meson ***,the localized CP violation can be found to compare with the experimental results from the three-body decay process at the LHC in the near future.

关键词： heavy flavor physics CP violation B decay

Reconstruction of power spectrum of primordial curvature perturbations on small scales from primordial black hole binaries scenario of liGO/VIRGO detection

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Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 87-93页

作者： Xinpeng Wang ying-li zhang Rampei Kimura Masahide Yamaguchi School of Physics Science and Engineering Tongji UniversityShanghai200092China Institute for Advanced Study of Tongji University Shanghai200092China Kavli Institute for the Physics and Mathematics of the Universe(WPI) Chiba277-8583Japan Center for Gravitation and Cosmology Yangzhou UniversityYangzhou225009China Waseda Institute for Advanced Study Waseda UniversityTokyo169-8050Japan Department of Physics Tokyo Institute of TechnologyTokyo152-8551Japan

As a candidate bound for the Binary Black Hole(BBH) merger events detected by liGO/Virgo, Primordial Black Holes(PBHs)provide a useful tool to investigate the primordial curvature perturbations on small scales. Using the GWTC-1 to GWTC-3 catalogs, under the scenario that PBHs originate from large primordial curvature perturbations on small scales during infiationary epoch, we for the first time reconstruct the power spectrum of primordial curvature perturbations on small scales. It is found that the value of the amplitude of the primordial power spectrum is enhanced to O(10-2)on scales O(1) pc. This may imply the validity of PBH as a possible BBH merger candidate.

关键词： primordial black hole primordial curvature perturbation gravitational wave inflation

A bright blue emission material based on anthracene:Synthesis,characterization and luminescent properties

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Chinese Chemical Letters 2009年第9期20卷 1047-1050页

作者： lin Fang Shi Bin li li ying zhang Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China Graduate School of the Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100039 China

A blue light-emitting material, 2-（N-ethyl-anthraceneyl-9） imidazo [4,5-f] 1,10-phenanthroline （EAIP）, has been synthesized and characterized by 1H NMR, IR, elemental and single crystal X-ray diffraction analysis. The results of theoretical calculations indicate that the HOMO and LUMO distributions mairdy locate at the anthracene fragment. It displays bright blue emission in both solid state and dichloromethane solution. The emission quantum yield calculated is 0.76. 2009 Bin li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Crystal structure X-ray diffraction Luminescence

Sedimentary Characterization of the Upper Paleozoic Coal-Bearing Tight Sand Strata, Daniudi Gas Field, Ordos Basin, China

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Journal of Earth Science 2016年第5期27卷 823-834页

作者： Wei Du Zaixing Jiang Qing li ying zhang Petroleum Exploration and Production Research Institute of SINOPEC Beijing 100083 China College of Energy China University of Geosciences Beijing 100083 China Research Institute of Petroleum Exploration and Development Petro China Beijing 100083 China

The coal-bearing strata of the Upper Paleozoic（from the Taiyuan Formation to the lower member of the Shanxi Formation） are the most important units that have high gas production in the Daniudi gas field, which is a typical tight-sandstone reservoir with high heterogeneity in the Ordos Basin, China. Based on an integrated investigation of well logs, cores, SEM and 3-D seismic data, we delineated the sedimentary facies of the coal-bearing strata and divided the succession into sequenced stratigraphic units of different depositional systems. A sedimentary hiatus was documented for the first time in the study area and forms the sequence boundary between the Lower Pennsylvanian Carboniferous Taiyuan Formation（Ct1） and the Upper Pennsylvanian Carboniferous Taiyuan Formation（Ct2）. The coal-bearing strata in Ct1 are indicative of a barrier coastal deposition system. Tidal channels are identified by their fine-grained, cross-stratified character. The sands in the tidal channels are well sorted, and the quartz content is above 95%. The coalbed located beside the sandstone is thought to be a lagoon. Gas-bearing, coarse-grained sandstone in the coal-bearing strata spanning from the Ct2 to the lower members of the Shanxi Formation（P1s） is interpreted as a fluvial-dominated braided delta that is divided into four third-order sequences. The coal-bearing strata are composed of sandstone, mudstone and coalbed from base to top in each sequence. Braided-river deposits form the lowstand system tract（LST） within each sequence. A shelf and lake depositional environment containing dark gray mudstone forms the transgressive systems tract（TST）. The highstand systems tract（HST） deposits form the swamp coalbed in each sequence.

关键词： sedimentary characterization depositional system Ordos Basin highstand systemtract.

Constitutive Models for Compressive Deformation of AZ80Magnesium Alloy under Multiple Loading Directions and Strain Rates

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Journal of Iron and Steel Research International 2016年第1期23卷 64-68页

作者： Xu-qing CHANG li-ying zhang Yong-biao YANG Jing-li REN School of Software North University of China School of Mathematics and Statistics Zhengzhou University School of Materials Science and Engineering North University of China

Two constitutive models,the modified Johnson-Cook model and the logarithm linear relation model based on empirical approach and data analysis,were presented to illustrate compressive deformation of magnesium alloys AZ80 under multiple loading directions and strain *** results of stress-strain curve analysis and sensitivity index analysis suggested that the stress held large fluctuations in loading direction of 90°.Model testing signified that the logarithm linear relation model was more proper than the modified Johnson-Cook model in view of relative mean square error and correlation ***,numerical simulation building on established models also indicated that the logarithm linear model is more precise than the modified Johnson-Cook model.

关键词： AZ80magnesium alloy constitutive model modified Johnson-Cook model loading direction

Synthesis and photovoltaic properties of new europium complex Eu(DBM)3(CPyBM)

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Chinese Chemical Letters 2007年第3期18卷 333-336页

作者： li ying zhang Bin li Shu Mei Yue Wen lian li Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China Graduate School of the Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100039 China

A new europium（Ⅲ） complex, tris（dibertzoylmethanate）{ 1-[9-hexyl-9-carbazole]-2-（2-pyridyl）-bertzimidazole}europium（Ⅲ） [Eu（DBM）a（CPyBM）] was synthesized and used as an electron-acceptor and electron-transport layer in organic photovoltaic （PV） device. Power conversion efficiency achieved from the device was 1.04% under illumination with 365 nm UV light at 1.6 mW/cm^2. Compared with the previous reported devices based on Eu（Ⅲ） complexes, the PV performances were improved. The working mechanism of the organic PV device was discussed.

关键词： Organic photovoltaic device Europium complex Synthesis

Enhancing Molecular Chain Entanglement and π-π Stacking Toward the Improvement of Shape Memory Performance of Polyimide

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Chinese Journal of Polymer Science 2023年第8期41卷 1261-1268,I0009页

作者： Jia-Qiang li Wen-Shuang li Wen-Ting zhang Shu Zhu Chu-Yang Luo Wan-Shuang liu li-ying zhang Shanghai Collaborative Innovation Center of High Performance Fibers and Composite(Province-Ministry Joint) Center for Civil Aviation CompositesDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Donghua Composites Technology Co.Ltd. Shanghai 201620China Key Laboratory of Textile Science&Technology College of TextilesDonghua UniversityShanghai 201620China

Thermoplastic polyimides(PIs)with shape memory potential have received growing attention in recent *** this work,highperformance thermoplastic PIs were fabricated by introducing PIs with chain rigidity(r-PI)into PI with chain flexibility(f-PI).The influences of molecular chain entanglement andπ-πinteractions on their thermomechanical and shape memory properties were *** degree of molecular chain entanglement was quantitively characterized based on dynamic mechanical analysis(DMA).Theπ-πinteractions were investigated in detail by X-ray diffraction(XRD)and UV-Vis *** was found that the entanglement density increased andπ-πinteractions became stronger with the introduction of r-PI into f-PI,leading to the improvement of shape ***,a broad and increased glass transition temperature(T_(g))was achieved,endowing the PIs with multiple shape memory *** synergistic effects of increased entanglement density and enhancedπ-πinteractions were beneficial to regulating interchain interactions and thereby achieving high shape memory performance of the PIs.

关键词： Shape memory polyimide Molecular chain entanglement r-r Stacking

Chlorine-Induced Hydrogen-Bonding Network of A Novel Dimer Based on Nickel and Tridentate ligand： 3-Hydrazine-4-amino-1,2,4-Triazole

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Chinese Journal of Chemistry 2015年第7期33卷 792-796页

作者： Yangang Bi Wenyuan Zhao ying li Tonglai zhang State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

The reaction of NiCl2 and 3-hydrazine-4-amino-1,2,4-triazole （Hatr） in the mixed solvent of EtOH and H2O yielded a dimer compound （[Ni2（Hatr）2（H2O）2（EtOH）2Cl2]ClzoEtOH） with water and EtOH molecules coordinated to nickle ions. It crystallized in trigonal space group R-3, a=b=29.67（1） A, c=8.95（7） A, β= 120（1）°, as determined by single-crystal X-ray diffraction. Then, they were fully characterized by the IR spectroscopy, differential scanning calorimetry （DSC）, thermogravimetry （TG）, and elemental analysis.

关键词： dimer compound tridentate ligand nickel X-ray diffraction differential scanning calorimetry

Geochemistry of the limahe Intrusion in the Panxi District, SW China:Discussion on the Relationship to the Emeishan Basalts

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 105-116页

作者： li ying zhang Zhaochong AI Yu ZHAO li YANG Tiezheng State Key Laboratory of Processed and Mineral Resources China University of Geoscinces Beijing 100083 China

The limahe intrusion is a typical rock hosting Cu-Ni sulfide deposit in the Panxi district. The major element, trace element and Sr-Nd isotopic geochemical data are reported in this study both firstly and systemically. Age-corrected （87Sr/86Sr） and εNd（t） isotope values, ranging from 0.687062 to 0.709298, from -0.6 to -4.13 respectively, are partly overlap the field of the Emeishan basalt and OIB, and they lie between upper crust and OIB generally. The similar patterns between the limahe intrusion and the picrites of the Emeishan large igneous province imply the genetic relationship to the Emeishan basalts. Their lower Nb/U （〈30）, higher （La/Nb）pM and （Th/Ta）pM ratio values （〉1） indicate contamination of the upper crust material. The correlation between MgO and major oxides reflects the fractional crystallization of olivine, clinopyroxene and minor plagioclase in the deep-seated chamber. Therefore increased SiO2 and lowered FeO by the upper crustal contamination may trigger immiscible sulfide melt, which then flowed along the structural fracture and intruded into gabbrodiorite, resulting in the formation of Cu-Ni sulfide orebody.

关键词： assimilation geochemistry mafic-utramafic intrusions limahe Panxi district