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Searching for Top Squark at Hadron Colliders

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高能物理与核物理 2002年第Z1期26卷 25-33页

作者： YANG Jin-Min Young Bing-Lin (Institute of Theoretical physics, CAS, Beijing 100080, china)(department of physics and Astronomy, Iowa State University, Ames, Iowa 50011, US A) Institute of Theoretical physics CAS Beijing 100080 China Institute of Theoretical physics CAS Beijing 100080 China department of physics and Astronomy Iowa State University Ames Iowa 50011 USA

In this talk we briefly summarise our recent study(hep-ph/0007165)on searching fortop squark at hadron *** light top-squark(stop)if produced in hadron colliders in theform of the (?)(?) pair and decaying through the l... 详细信息

关键词：高能物理核物理 QCD Searching for Top Squark at Hadron Colliders pair LHC

FRACTAL RESEARCH ON CRACKS PROPAGATION OF GAS PIPELINE X52 STEEL WELDING LINE UNDER HYDROGEN ENVIRONMENT

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Acta Metallurgica Sinica(English Letters) 2001年第3期14卷 219-226页

作者： S.H. Dong , Y.M. Lu, Y. Zhang and Q. Wu (Mechanics Electronic department, University of Petroleum, Beijing 102200, china) (department of Material physics, University of Science and Technology Beijing, Beijing 100083, china) (Yan Shan University, Qinhuangd Dept. of Mech. Electron. Univ. of Pet. Beijing 102200 China

Based on the theory of hydrogen enhanced localized plasticity of the hydrogen induced cracking and the consideration of the effect of the residual stress produced by eliminated stress heat-treatment, a fractal model of hydrogen induced cracking was presented, and the relationships among the effective surface energy (H), fractal dimension D and stress intensity factor of hydrogen induced cracking, KIH, for welding pipeline under hydrogen environment was set up, from which the relationship of D and KISCC was obtained. The model has been verified experimentally to be correct.

关键词： Crack initiation Electric arc welding Environmental impact Fractals Hydrogen

Interaction of two two-level atoms with SU (1, 1 ) coherent states

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Chinese Journal of Lasers 1994年第6期B3卷 521-528页

作者： SONG Tongqiang FENG Jian WANG Wenzheng XU Jingzhi(l) Institufe of Optical Communicafion, Uaocbeng Teacborsl College,Shandong 252059, china)(2) department of physics, tiaocbong Teacborsl College,Shandong 252059, china) Liaocheng Teachers' Coll Liaocheng China

Ｉｎｔｅｒａｃｔｉｏｎｏｆｔｗｏｔｗｏ－ｌｅｖｅｌａｔｏｍｓｗｉｔｈＳＵ（１，１）ｃｏｈｅｒｅｎｔｓｔａｔｅｓ￥ＳＯＮＧＴｏｎｇｑｉａｎｇ；ＦＥＮＧＪｉａｎ；ＷＡＮＧＷｅｎｚｈｅｎｇ；ＸＵＪｉｎｇｚｈｉ... 详细信息

Ｉｎｔｅｒａｃｔｉｏｎｏｆｔｗｏｔｗｏ－ｌｅｖｅｌａｔｏｍｓｗｉｔｈＳＵ（１，１）ｃｏｈｅｒｅｎｔｓｔａｔｅｓ￥ＳＯＮＧＴｏｎｇｑｉａｎｇ；ＦＥＮＧＪｉａｎ；ＷＡＮＧＷｅｎｚｈｅｎｇ；ＸＵＪｉｎｇｚｈｉ（ｌ）ＩｎｓｔｉｔｕｆｅｏｆＯｐｔ...

关键词： coherent state squeezed vacuum state two--photon TC model

A Series of Soliton-like and Double-like Periodic Solutions of a (2+1)-Dimensional Asymmetric Nizhnik-Novikov-Vesselov Equation

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Communications in Theoretical physics 2004年第11期42卷 655-660页

作者： CHEN Yong,~(1,3,4, WANG Qi~(2,4) LI Biao~(2,4) ~1department of Mathematics,Ningbo University,Ningbo 315211,china ~2department of Applied Mathematics,Dalian University of Technology,Dalian 116024,china ~3department of physics,Shanghai Jiao Tong University,Shanghai 200030,china ~4Key Laboratory of Mathematics Mechanization~ the Chinese Academy of Sciences,Beijing 100080,china department of Mathematics Ningbo University Ningbo 315211 China department of physics Shanghai Jiao Tong University Shanghai 200030 China Key Laboratory of Mathematics Mechanization the Chinese Academy of Sciences Beijing 100080 China department of Applied Mathematics Dalian University of Technology Dalian 116024 China

We generalize the algebraic method presented by Fan [***.A:***.36 (2003) 7009)] to uniformlyconstruct a series of soliton-like solutions and double-llke periodic solutions for nonlinear partial differential equations(NPDE),As an application of the method,we choose a (2+1)-dimensional asymmetric Nizhnik-Novikov-Vesselov equa-tion and successfully construct new and more general solutions including a series of nontraveling wave and coefficientfunctions’ soliton-like solutions,double-like periodic and trigonometric-like function solutions.

关键词： symbolic computation soliton-like solution Weierstrass and Jacobi elliptic functions periodic solution

Analytical Potential Energy Function,Spectroscopic Constants and Vibrational Levels for A^1E_u^+ State of Dimer ~7Li_2

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Communications in Theoretical physics 2007年第12期48卷 1081-1087页

作者： SHI De-Heng~1 MA Heng~1 SUN Jin-Feng~(1,2)and ZHU Zun-Lue~1~1 College of physics & Information Engineering,Henan Normal University,Xinxiang 453007,china~2 department of physics & Electron Science,Luoyang Normal University,Luoyang 471022,china College of physics & Information Engineering Henan Normal University Xinxiang 453007 China department of physics & Electron Science Luoyang Normal University Luoyang 471022 China

The symmetry-adapted-duster configuration-interaction method is used to investigate the spectroscopicproperties of ~7Li_2(A^1∑_u^+) over the internuclear distance ranging from 2.4ao to *** complete potential energycurves are calculated at numbers of basis *** the ab initio calculated points are fitted to the analytic MurrellSorbie function and then employed to compute the spectroscopic *** comparison,the spectroscopic constantsreproduced by the potential attained at D95(3df,3pd) are found to be very close to the experiments,a^d the values (T_e,D_e,R_e,ω_e,ω_eχ_e,α_e and B_e) are of 1.732 93 eV,1.161 36 eV,0.313 27 nm,251.95 cm^(-1),1.623 cm^(-1),0.005 35 cm^(-1),and0.490 cm^(-1),*** the potential obtained at D95(3df,3pd),the totally 75 vibrational states are found whenJ=*** vibrational levels,the classical turning points and the inertial rotation constants of the first 68 vibrationalstates are calculated for the first time and compared with the available *** agreement is *** centrifugal distortion constants of the first 32 vibrational states are also reported for the first *** reasonabledissociation limit for ~7Li_2(A^1∑_u^+) is deduced using the calculated results at present.

关键词： analytic potential energy function harmonic frequency dissociation energy vibrational level classical turning point

Performance of Polarizers and Coupler in an All Polarization Maintaining Fiber Interferometer

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Chinese Journal of Lasers 2000年第2期9卷 148-154页

作者： CHEN Zhe LIAO Yanbiao HU Yongming LI Xiujian MENG Zhou ( department of Electronic Engineering, Tsinghua University, Beijing 100084, china department of Applied physics, National University of Defense Technology, Changsha 410073, china ) 清华大学北京 100084 国防科学技术大学湖南长沙

It is given mathematical models and analyze the performance of polarizers and coupler in an all polarization maintaining fiber (PMF) Michelson interferometer. The optical coherent signal to noise ratio (CSNR) of the i... 详细信息

关键词： polarization maintaining fiber interferometer optical fiber polarizer optical fiber coupler Jones matrix

Exact Solutions of Bogoyavlenskii Coupled KdV Equations

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Communications in Theoretical physics 2004年第10期 485-487页

作者： HU Heng-Chun~1 LOU Sen-Yue~(1,2)1 department of physics,Shanghai Jiao Tong University,Shanghai 200030,china 2 department of physics,Ningbo University,Ningbo 315211,china

The special soliton solutions of Bogoyavlenskii coupled KdV equations are obtained by means of thestandard Weiss Tabor-Carnvale Painlevé truncation expansion and the nonstandard truncation of a modified Conte’sinvar... 详细信息

关键词： Painlevétruncation expansion coupled KdV equation

含时空关联噪声的非局域及各向异性Kardar-Parisi -Zhang方程的直接标度分析

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物理学报 2002年第5期51卷 994-998页

作者：唐刚马本堃中国矿业大学物理系徐州221008 北京师范大学物理系和理论物理研究所北京100875

将直接标度分析方法推广应用到含时间空间关联噪声的非局域及各向异性Kardar Parisi Zhang方程的动力学标度分析中 ,分别得到了方程在强耦合区和弱耦合区的标度指数值 .

关键词：时空关联噪声非局域各向异性直接标度分析 KPZ方程表面界面动力学粗化生长

Bs（d）0-■s（d）0 Mixing and New physics Effects in a Top Quark Two-Higgs Doublet Model

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Communications in Theoretical physics 2007年第6期47卷 1099-1105页

作者： Lü Lin-Xia~(1,2,+) XIAO Zhen-Jun~(1,++)1 department of physics and Institute of Theoretical physics,Nanjing Normal University,Nanjing 210097,china2 department of physics,Nanyang Teacher's College,Nanyang 473061,china

We calculate the new physics contributions to the neutral Bd0and Bs0meson mass splitting △Mdand △Msinduced by the box diagrams involving the charged-Higgs bosons in the top quark two-Higgs doublet model（T2HDM）.Using the precision data,we obtain the bounds on the parameter space of the T2HDM:（a）For fixed MH=400 GeVand δ=[0°,60°],the upper bound on tan β is tan β≤30 after the inclusion of major theoretical uncertainties;（b）Forthe case of tan β≤20,a light charged Higgs boson with a mass around 300 GeV is allowed;and（c）The bounds ontan β and MHare strongly correlated:a smaller（larger）tan β means a lighter（heavier）charged Higgs boson.

关键词： B meson mixing new physics effects two-Higgs-doublet model