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Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

Chinese Physics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis x.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai x.Cai A.Calcaterra G.F.Cao N.Cao s.A.Cetin J.F.Chang W.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.s.Chen M.L.Chen s.J.Chen s.L.Chen s.M.Chen T.Chen x.R.Chen x.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen s.K.Choi x.Chu G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Fang s.s.Fang W.x.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.T.Feng K.Fischer M.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao Y.N.Gao Yang Gao s.Garbolino I.Garzia P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck B.Ding x.x.Ding Y.Ding Y.Ding J.Dong L.Y.Dong M.Y.Dong x.Dong M.C.du s.x.du Z.H.duan P.Egorov Y.H.Fan J.Fang JA.Gilman K.Goetzen L.Gong W.x.Gong W.Gradl s.Gramigna M.Greco M.H.Gu Y.T.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez K.L.Han T.T.Han x.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou x.T.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.M.Hu J.F.Hu T.Hu Y.Hu G.s.Huang K.x.Huang L.Q.Huang x.T.Huang Y.P.Huang T.Hussain F.H\"olzken N.H\"usken N.in der Wiesche M.Irshad J.Jackson s.Janchiv J.H.Jeong Q.Ji Q.P.Ji W.Ji x.B.Ji x.L.Ji Y.Y.Ji x.Q.Jia Z.K.Jia D.Jiang H.B.Jiang P.C.Jiang s.s.Jiang T.J.Jiang x.s.Jiang Y.Jiang J.B.Jiao J.K.Jiao Z.Jiao s.Jin Y.Jin M.Q.Jing x.M.Jing T.Johansson s.Kabana N.Kalantar-Nayestanaki x.L.Kang x.s.Kang M.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf M.Kuessner x.Kui A.Kupsc W.K\"uhn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.B.Li H.J.Li H.N.Li Hui Li J.R.Li J.s.Li K.Li L.J.Li L.K.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.x.Li R.Li s.x.Li T.Li W.D.Li W.G.Li x.Li x.H.Li x.L.Li x.Y.Li Y Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics sB RAs(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central south University Changsha 410083China China Center of Advanced science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GsI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BEsIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(s)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKM angleγ(ϕ_(3))via the B^(−)→DK^(−)decay.

关键词： BEsIII D^(0)meson decays amplitude analysis CP-even fraction

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Epitaxial growth and air-stability of monolayer Cu2Te

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Chinese Physics B 2020年第1期29卷 99-102页

作者： K Qian L Gao H Li s Zhang J H Yan C Liu J O Wang T Qian H Ding Y Y Zhang x Lin s x du H-J Gao Institute of Physics&University of Chinese Academy of sciences Chinese Academy of SciencesBeijing 100190China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China CAs Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China

A new two-dimensional atomic crystal, monolayer cuprous telluride（Cu2Te） has been fabricated on a graphenesi C（0001） substrate by molecular beam epitaxy（MBE）. The low-energy electron diffraction（LEED） characterization shows that the monolayer Cu2Te forms ■ superstructure with respect to the graphene substrate. The atomic structure of the monolayer Cu2Te is investigated through a combination of scanning tunneling microscopy（sTM） experiments and density functional theory（DFT） calculations. The stoichiometry of the Cu2Te sample is verified by x-ray photoelectron spectroscopy（xPs） measurement. The angle-resolved photoemission spectroscopy（ARPEs） data present the electronic band structure of the sample, which is in good agreement with the calculated results. Furthermore, air-exposure experiments reveal the chemical stability of the monolayer Cu2Te. The fabrication of this new 2D material with a particular structure may bring new physical properties for future applications.

关键词： cuprous telluride(Cu2Te) scanning tunneling microscopy(sTM) density functional theory(DFT) chemical stability

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Distinct Electrical and Mechanical Responses of a Cu-10Fe Composite Prepared by Hot-Pressed sintering and Post Treatment

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Acta Metallurgica sinica(English Letters) 2024年第2期37卷 255-265页

作者： x.Y.Yue s.Y.Peng x.Zhang C.N.He Y.Z.Tian Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China school of Materials science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin300350China Research Centre for Metallic Wires Northeastern UniversityShenyang110819China

A Cu-10wt%Fe composite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** precipitation behavior and performance changes were systematically studied by using scanning electron microscopy and transmission electron *** contrast to the hot-pressed sintered specimen,the solution treatment significantly affects the thermal stability and properties of the Cu-10wt%Fe *** Cu-10wt%Fe composite was prepared after solid solution,cold rolling and aging at 773 K for 1 h,and it obtained excellent tensile strength of 494 MPa,uniform elongation of 16.3%,electrical conductivity of 51.1%IACs and softening temperature of 838 *** for the distinct difference in thermal stability and properties between hot-pressed sintered and solution treated specimens were *** findings provide a theoretical basis for designing high-performance Cu-based in-situ composites by post treatment.

关键词： Cu-Fe composite Hot-pressed sintering Thermal stability strength Electrical conductivity

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High-pressure minerals and new lunar mineral changesite-(Y) in Chang’e-5 regolith

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Matter and Radiation at Extremes 2024年第2期9卷 90-97页

作者： Jing Yang Wei du Center for Lunar and Planetary sciences Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China state Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of Sciences(CAS)Guiyang 550081China CAs Center for Excellence in Comparative Planetology Hefei 230026China

Forty-five years after the Apollo and Luna missions, China’s Chang’e-5 (CE-5) mission collected ∼1.73 kg of new lunar materials from one ofthe youngest basalt units on the Moon. The CE-5 lunar samples provide opportunities to address some key scientific questions related to theMoon, including the discovery of high-pressure silica polymorphs (seifertite and stishovite) and a new lunar mineral, changesite-(Y). seifertitewas found to be coexist with stishovite in a silica fragment from CE-5 lunar regolith. This is the first confirmed seifertite in returned lunarsamples. seifertite has two space group symmetries (Pnc2 and Pbcn) and formed from an α-cristobalite-like phase during “cold” compressionduring a shock event. The aftershock heating process changes some seifertite to stishovite. Thus, this silica fragment records different stagesof an impact process, and the peak shock pressure is estimated to be ∼11 to 40 GPa, which is much lower than the pressure condition forcoexistence of seifertite and stishovite on the phase diagram. Changesite-(Y), with ideal formula (Ca_(8)Y)◻Fe^(2+)(PO_(4))_(7) (where ◻ denotes avacancy) is the first new lunar mineral to be discovered in CE-5 regolith samples. This newly identified phosphate mineral is in the form ofcolumnar crystals and was found in CE-5 basalt fragments. It contains high concentrations of Y and rare earth elements (REE), reaching upto ∼14 wt. % (Y,REE)2O3. The occurrence of changesite-(Y) marks the late-stage fractional crystallization processes of CE-5 basalts combinedwith silicate liquid immiscibility. These new findings demonstrate the significance of studies on high-pressure minerals in lunar materials andthe special nature of lunar magmatic evolution.

关键词： evolution minerals basalt

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Fast efficient photon deceleration in plasmas by using two laser pulses at different frequencies

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Matter and Radiation at Extremes 2024年第3期9卷 11-18页

作者： Y.x.Wang x.L.Zhu s.M.Weng P.Li x.F.Li H.Ai H.R.Pan Z.M.sheng Key Laboratory for Laser Plasmas(moe) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFsA Shanghai Jiao Tong UniversityShanghai 200240China Research Center of Laser Fusion of China Academy of Engineering Physics MianyangSichuan 621900China state key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultrashort high-power light sources in the mid-infrared(mid-IR)to terahertz(THz)range is of interest for applications in a number of fields,from fundamental research to biology and *** conventional laser technology,photon deceleration in plasma wakes provides an alternative approach to the generation of ultrashort mid-IR or THz ***,we present a photon deceleration scheme for the efficient generation of ultrashort mid-IR or THz pulses by using an intense driver laser pulse with a relatively short wavelength and a signal laser pulse with a relatively long *** signal pulse trails the driver pulse with an appropriate time delay such that it sits at the front of the second wake bubble that is driven by the driver *** to its relatively long wavelength,the signal pulse will be subjected to a large gradient of the refractive index in the plasma wake ***,the photon deceleration in the plasma wake becomes faster and more efficient for signal pulses with longer *** greatly enhances the capacity and efficiency of photon deceleration in the generation of ultrashort high-power light sources in the long-wavelength IR and THz spectral ranges.

关键词： laser ultrashort photon

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Tailoring the surface chemical bond states of the NbN coatings by doping Ag:impact the tribological behavior and wettability

Tailoring the surface chemical bond states of the NbN coatin...

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中国晶体学会第六届学术年会暨会员代表大会——多晶（粉晶）衍射分会

作者： P.Ren M.Wen s.x.du K.Zhang W.T.Zheng Department of Materials science Jilin University

There has been much emphasis in the high hardness,robust hydrophobic and excellent tribological behavior for transition metal nitrides when which as protective coating materials exposed to *** this work,the Nb(Ag)N coatings were deposited on si(100)substrates by reactive co-sputtering,in which the Nb atoms were substituted by the Ag atoms as Ag/Nb ratio(R) increases from 0.01 to *** coatings exhibit the high hardness(8GPa),low coefficient of friction(CoF,0.18) and wear rates(0.41×10 mm Nm),also with the high hydrophobic property(Water contact angle(WCA),-119°).significantly,a detailed investigation both in experiment and theoretical calculation were employed to reveal the relationship between the micro structure and the excellent trobological behavior and high *** the R increased from 0 to 0.15,the coatings transformed from NbN to NbN/Ag solute nanostructure ***,the CoF deceased from 0.67 to 0.18 and the wear-rate reduced,which can be ascribed to the AgNbO tribo-film rapidly formed during friction due to the reducing of the N desorption activation energy as R *** increasing R to 0.26,the lubricating effects became weaker because the Ag nanoinclusions segregation at NbN grain boundaries cause the restraint of information for AgNbO,finally result in the increased in the *** the NbN/Ag solute nanostructure coatings(0.01 s(10319°) can be ascribed to the surface silver ions(Ag) in the AgO have a special closed shells structure of the electron(4d5s),leading a less number of the polar sites for the hydrogen bonding with interfacial water molecules on the surface of ***,WCA of the NbN/Ag coating decreased to 96° as R up to 0.26,these also can be attributed to the Ag separated from the supersaturated NbN lattice accompanied by the decreasing of AgO contents on the surface of the *** all,as increased of Ag content,the fomation of solute nanostructures in the coatings

关键词： NbN/Ag coating solute nanostructures Microhardness Hydrophobic Friction and wear

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直肠腺癌病人全肿瘤扩散峰度成像直方图分析与临床病理预后的相关性研究

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国际医学放射学杂志 2018年第3期 368-369页

作者： Y.F.Cui x.T.Yang x.s.du Z.Z.Zhuo L.xin x.T.Cheng 王姗姗 Department of Radiology Shanxi Province Cancer Hospital Shanxi Medical University

摘要目的本实验旨在研究直肠腺癌病人全肿瘤扩散峰度成像直方图分析和临床病理预后的潜在关系。材料与方法本研究共纳入79例直肠腺癌病人进行MR检查。利用全

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Prediction of Dirac state in monolayer TiB2

Prediction of Dirac state in monolayer TiB2

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中国真空学会2014学术年会

作者： L.Z.Zhang s.R.song Z.F.Wang s.x.du H.-J.Gao F.Liu Institute of Physics Chinese Academy of Sciences Department of Materials science and Engineering University of Utah Collaborative Innovation Center of Quantum Matter

We predict the existence of Dirac state in monolayer TiB2 sheet(m-TiB2),a two-dimensionalmetal diboride,based on first-principles *** structure of m-TiB2 is found to becharacterized with anisotropic Dirac cones with the largest Fermi velocity of 0.57×10m/s,whichis about one-half of that of *** Dirac point is located at the Fermi level between K andΓpoint,with Dirac states arising primarily from d orbitals of *** m-TiB2 exhibitsa bending instability,so that a planar m-TiB2 needs to be stabilized on a *** m-TiB2 on h-BN substrate reveals a negligible influence of the h-BN substrate to the electronicproperties of *** findings extend the Dirac materials to metal diborides.

关键词： Dirac state two-dimensional material TiB2 first-principles calculations

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Molecular“Coupled Butterfly”on Ag(110):Experiment and First-principles Calculations

Molecular“Coupled Butterfly”on Ag(110):Experiment and Firs...

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2005年纳米和表面科学与技术全国会议

作者： W.Guo s.x.du H.-J.Gao Nanoscale Physics & Devices Laboratory,Institute of Physics,CAs,Beijing 100080

The adsorption behavior of organic π-conjugated molecules on single crystals is ofgreat interest because their physical and chemical properties are keys for molecularscale self-assembly,which is important to improve properties of electronic andoptoelectronic devices such as light-emitting diodes,field-effect transistors and thinfilm *** studying the adsorption behavior of these molecules theunderstanding of adsorption processes can be *** our work,one aromatic

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Room-temperature ferromagnetism and perfect spin filtering in transition-metal-doped graphyne nanoribbons

Room-temperature ferromagnetism and perfect spin filtering i...

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中国真空学会2014学术年会

作者： J.B.Pan s.x.du L.D.Pan Y.F.Zhang H.-J.Gao s.T.Pantelides Institute of Physics Chinese Academy of Science Department of Physics and Astronomy Vanderbilt University Materials science & Technology Division Oak Ridge National Laboratory

Ferromagnetism in half-metallic two-dimensional materials can lead to unique spintronics *** we report first-principles calculations that predict monolayer graphyne nanoribbons(GyNRs),analternative to graphene,doped randomly with 3d-series transition metal atoms at high concentrations are ferromagnetic(FM)with Curie temperatures above room ***,Cr-,Fe-and Co-doped GyNRs are half-mettallic with 100%spin polarization at the Fermi level and can act as perfect spin *** high spin polarization of the current is preserved up to large bias *** study provides a basis for the fabrication of GyNRs with high Curie temperature and spin-polarized electron transport properties.

关键词： ferromagnetism spin filtering graphyne nanoribbons

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