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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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Photovoltaic enhancement of Si solar cells by assembled carbon nanotubes

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Nano-Micro Letters 2010年第1期2卷 22-25页

作者： y.f.Zhang y.f.wang N.Chen y.y.wang y.Z.Zhang Z.H.Zhou L.M.Wei Key laboratory for Thin film and Microfabrication of the Ministry of Education National Key Laboratory of Nano/Micro Fabrication Technology Research Institute of Micro/Nano Science and Technology Shanghai Jiao Tong University

Photovoltaic conversion was enhanced by directly assemble of a network of single-walled carbon nanotubes(SWNTs) onto the surface of n-p junction silicon solar cells. When the density of SWNTs increased from 50 to 400 tubes μm^(-2), an enhancement of 3.92% in energy conversion efficiency was typically obtained. The effect of the SWNTs network is proposed for trapping incident photons and assisting electronic transportation at the interface of silicon solar cells.

关键词： Solar cell Carbon nanotube Photovoltaic enhancement Heterojunction

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Preconditioning non-monotone gradient methods for retrieval of seismic reflection signals

Preconditioning non-monotone gradient methods for retrieval ...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： y.f.wang Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Sciences

The core problem in seismic exploration is to invert the subsurface reflectivity from the surface recorded seismic ***,most of the seismic inverse problems are ill-posed by *** overcome the ill-posedness, different regularized least squares methods are introduced in the *** this paper,we developed a preconditioning non-monotone gradient method, proved it converges with R-superlinear rate and applied it to seismic decon-volution and *** examples demonstrate that the method is *** helps to improve the resolution of the seismic inversions.

关键词： Ill-posed problem Regularization Non-monotone gradient Preconditioning Seismic inversion

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Achieving high hetero-deformation induced(HDI)strengthening and hardening in brass by dual heterostructures

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Journal of Materials Science & Technology 2022年第3期98卷 244-247页

作者： X.T.fang Z.K.Li y.f.wang M.Ruiz X.L.Ma H.y.wang y.Zhu R.Schoell C.Zheng D.Kaoumi y.T.Zhu Department of Materials Science and Engineering North Carolina State UniversityRaleighNC 27695USA Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education Northeastern UniversityShenyang 110819China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China Department of Materials Science and Engineering Texas A and M UniversityCollege StationTX 77840USA Department of Mechanical and Aerospace Engineering North Carolina State UniversityRaleighNC 27695USA Department of Nuclear Engineering North Carolina State UniversityRaleighNC 27695USA Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical UniversityXi’an 710072China

Heterostructured materials,defined as materials that contain multiple zones with dramatically different flow stresses,have the potential to push the envelope of the strength-ductility of metals and alloys beyond what can be obtained conventionally[1–3].A prominent example is the heterogeneous lamella Ti that is as strong as its ultrafine-grained Ti,while as ductile as the coarsegrained Ti[4].

关键词： grain strengthening deformation

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Large Bandgaps of Two-Dimensional Phononic Crystals with Cross-like Holes

Large Bandgaps of Two-Dimensional Phononic Crystals with Cro...

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The 16th Annual Conference of Hong Kong Society of Theoretical and Applied Mechanics 2012、The 1st Mainland-Hong Kong youth forum on Mechanics 2012、The 8th Shanghai-Hong Kong forum on Mechanics and Its Application 2012

作者： y.f.wang y.S.wang Institute of Engineering Mechanics Beijing Jiaotong University

Phononic crystal(PC) is an artificial periodic elastic/acoustic structure with acoustic or elastic bandgaps within which the propagation of elastic/acoustic waves is fully *** PC may have potential applications in acoustic filtering,noise suppression,vibration isolation,and design of new acoustic devices,***,a certain degree of interests is being generated on the PCs with periodic holes(vacuum or filled with air) with their bandgaps mainly determined by the geometric *** of the reports are focused on the systems with convex holes(circular or regular polygon holes).But,the difference between convex and non-convex holes may lead to evident change of *** motivates the investigation on bandgaps of PCs with non-convex *** this paper,the finite element method(fEM) based on the Comsol Multiphysics software is used to study the effects of geometric parameters on the bandgaps of 2D systems in a square lattice with cross-like(a kind of non-convex) holes which are denoted as the "+"-hole and "x"-hole respectively.

关键词： Large Bandgaps of Two-Dimensional Phononic Crystals with Cross-like Holes

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flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry

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微系统与纳米工程(英文) 2023年第3期9卷 411-417页

作者： B.K.Xiang S.y.wang y.f.wang J.J.Zhu H.T.Xu y.H.wang State Key Laboratory of Surface Physics and Department of Physics FudanUniversity200433 ShanghaiChina Shanghai Research Center for Quantum Sciences 201315 ShanghaiChina

A nanofabricated superconducting quantum interference device(nano-SQUID)is a direct and sensitive flux probe used for magnetic imaging of quantum materials and mesoscopic *** to the functionalities of superconductive integrated circuits,nano-SQUIDs fabricated on chips are particularly versatile,but their spatial resolution has been limited by their planar ***,we use femtosecond laser 3-dimensional(3D)lithography to print a needle onto a nano-SQUID susceptometer to overcome the limits of the planar *** nanoneedle coated with a superconducting shell focused the flux from both the field coil and the *** performed scanning imaging with such a needle-on-SQUID(NoS)device on superconducting test patterns with topographic *** NoS showed improved spatial resolution in both magnetometry and susceptometry relative to the planarized *** work serves as a proof-of-principle for integration and inductive coupling between superconducting 3D nanostructures and on-chip Josephson nanodevices.

关键词： lithography SQUID needle

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Recovering aerosol particle size distribution function on the set of bounded piecewise-convex functions

Recovering aerosol particle size distribution function on th...

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中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： y.f.wang y.Zhang D.V.Lukyanenkob A.G.yagola Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Sciences Department of Mathematics Physical FacultyMoscow State UniversityMoscowRussia

In this article we discuss the determination of the aerosol particle size distribution function using the particle spectrum extinction *** is an ill-posed integral equation of the first kind,since we are often faced with limited or insufficient observations in remote sensing and the observations are contaminated. To overcome the ill-posed nature,using the a priori information,we study the inflection point regulanzation method and develop a conjugate gradient projection method for solving the corresponding optimization *** our work,regulanzation parameter can be considered as the number of inflection points and their *** algorithms for constructing an approximate solution are *** estimates are also *** numerical tests for both the synthetic problem and practical problem are given to show the efficiency and feasibility of the proposed algorithm.

关键词： aerosol particle size distribution function fredholm integral equation of the first kind piecewise-convex functions conjugate gradient projection method

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Effects of Poisson's Ratio on Band Gaps of Two-Dimensional Solid/Solid Phononic Crystals

Effects of Poisson's Ratio on Band Gaps of Two-Dimensional S...

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作者： T.X.Ma X.X.Su y.f.wang y.S.wang Institute of Engineering Mechanics Beijing Jiaotong University School of Electronic and Information Engineering Beijing Jiaotong University

Since the 1990s,there has been a great deal of work devoted to the study of phononic crystals(PCs).The existence of a phononic band gap(PBG) where the propagation of the acoustic or elastic waves is forbidden leads to many engineering *** the PBG tuning mechanism is always an important aspect of the theoretical studies of PCs. In this paper,we study the effects of the Poisson's ratios on the PBGs in two-dimensional(2D) solid-solid square-latticed *** to the theoretical importance and practical application of the auxetic material,the effect of negative Poisson's ratio is also considered in the present work. for the in-plane wave mode,the material parameters determining PBGs include the velocity ratio,the acoustic impedance ratio and the Poisson's ratios of the two component materials[1].We investigate the influences of the Poisson's ratio on 2D square-latticed PCs with given values of the velocity ratio and acoustic impedance *** different combinations of the velocity ratio and acoustic impedance ratio correspond to the large impedance ratio with small mismatch in the transverse wave velocities,small velocity ratio with small mismatch in the acoustic impedances and small impedance ratio with small mismatch in the wave *** PBGs between the 2nd and 3rd,3rd and 4th bands are *** are usually the first or second PBGs. for the PCs with large impedance ratio and small mismatch in the wave velocities,the PBG is influenced slightly by the Poisson's ratio of the host,but significantly by that of the inclusion when its value is *** the PCs with small velocity ratio and small mismatch in the acoustic impedances,the PBGs between the 3rd and 4th bands are sensitive to the Poisson's ratios of both the host and inclusion;those between the 2nd and 3rd bands are influenced significantly by the Poisson's ratio of the inclusion and become wider as the Poisson's ratio of the inclusion *** the PCs with small impedance rati

关键词： Poisson Effects of Poisson's Ratio on Band Gaps of Two-Dimensional Solid/Solid Phononic Crystals

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Tailoring Microstructures and Mechanical Properties of AlCoCrfeNiTi0.3 High-entropy Alloys by Heat Treatment

Tailoring Microstructures and Mechanical Properties of AlCoC...

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中国材料大会2012

作者： J.W.Qiao y.f.wang R.Q.wang J.y.Shi S.B.Sang H.J.yang College of Materials Science and Engineering Taiyuan University of Technology Research center of Advanced Materials Science and Technology Taiyuan University of Technology MicroNano System Research Center Taiyuan University of Technology Research Institute of Surface Engineering Taiyuan University of Technology

ISBN: (纸本)9783037856079

The microstructures and mechanical properties of AlCoCrfeNi0.3 high-entropy alloys （HEAs） are tailored through heat treatment. During heat treatment, the dendrite phase with a body-centered-cubic （bcc） structure transformed into the interdendrite phase with a bcc structure. Due to the element accumulation with higher hardness in the interdendrites and the increase of volume fraction of interdendrites, the average hardness of AlCoCrfeNi0.3 HEAs increased with the heat-treatment temperature, and the highest hardness was 625 HV. After 500 ℃ heat treatment, the optimized mechanical properties under quasi-static compression were achieved, and the yielding strength and fracture plasticity were 2.30 GPa and 9 %, respectively. Upon dynamic loading, the mechanical properties of HEAs were greatly enhanced.

关键词： High-entropy alloy Heat treatment Mechanical properties Dynamic loading

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Energetic ions modulation by ULf wave in the duskside flank of magnetosphere observed by Double star TC-1

Energetic ions modulation by ULF wave in the duskside flank ...

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第十二届全国日地空间物理学术讨论会

作者： L.Xie Q.-G.Zong y.f.wang Z.y.Pu (Peking University.Department of Geographysics.100871)

＜正＞Energetic ion （5eV-30keV） flux variations associated with ultralow frequency （ULf） waves in the duskside flank were observed during a very quite period when Double star TC-1 pass near 0230 MLT on Oct.17,2004...

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