简介：UsingtheefectiveHamiltonianmethod,weanalyzetheB0-ˉB0mixingintheextensionofthestandardmodel(SM)wherebaryonnumberandleptonnumberarelocalgaugesymmetries.ThenumericalresultsindicatethecorrectionfromtheextraparticlestothemassdiferencemBissignificant.Thereisa60%enhancementcomparedtotheSMpredictionformBatmost,whichagreeswiththecurrentexperimentalresult.

简介：Thefeaturesofthelow-lyingspectraoffour-bodyA+B-A+B-systemshavebeendeducedbasedonsymmetry.Usingthemethodoffew-bodyphysics,wecalculatetheenergyspectraofA+B-A+B-systemsinaharmonicquantumdot.Wefindthatthebiexcitoninatwo-dimensionalquantumdotmayhaveotherboundexcitedstatesandthequantummechanicalsymmetryplaysacrucialroleindeterminingtheenergylevelsandstructuresofthelow-lyingstates.

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简介：从电子在电磁场中的狄拉克方程出发,得出电子在电磁场中波函数,分析磁矢热A引起的电子概率波的相移,结果表明:影响电子波函数的相位变化不是B而是A(x),即有一个额外相因子附加在电子概率波上,进而通过量子干涉出现图样的位移。结论是A—B效应的存在说明磁场的物理效应不能完全用B描述,而是附加在电子概率波上的相因子。

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简介：WeinvestigateindetailtheeffectsofR-parityleptonnumberviolationonthedecay~↑b1→b~↑x1^0intheR-parityviolatingminimalsupersymmetricstandardmodel(Rp-MSSM)underthepresentexperimentalconstraintsonRpparameters.Inournumericalcalculationsweconsidertwocasesofinputparametersofthesquarkandsleptonsectors,MsquarkMslepton,forcomparison.TheresultsshowthattherelativeR-parityviolatingcorrectionisnotverysensitivetothemassofthelightestneutralino-0↑x1andthedegenerateR-parityviolatingcouplingparameterλ2′,butstronglydependsonMsquark,Mslepton,tanβandthedegenerateR-parityviolatingcouplingparameterλ1′.Therelativecorrectionisabout-4～3%andcanexceed-6%insomeregionofparameterspace.Therefore,preciseexperimentanalysesonthedecay~↑b1→b~↑x1^0mayprovideaprobeoftheR-parityviolation.

简介：一个新算法被介绍产生开发通过一条Bézier曲线的表面把一根准线称为的有能力的Bézier。算法基于微分几何学理论在上必要；为是的表面的足够的条件发展能，；在为参数曲线的度评估公式上；为伯恩斯坦基础的线性独立。没有非线性的典型方程不得不被解决。而且为一个锥的顶点；为正切表面的回归的边能容易被获得。Aumann的算法为开发有能力的表面是这篇论文的一种特殊情况。

简介：由于与会者来自国内高校物理教学第一线，讨论起教学来非常热烈。

简介：BasedonthelowenergyeffectiveHamiitonianwithnaivefactorization,wecalculatethebranchingratios（BRs）andCPasymmetries（CPAs）forthetwentythreedoublecharmdecaysB/Bs→Ds*Ds*inboththestandardmodel（SM）andtheminimalsupergravity（mSUGRA）model.Withintheconsideredparameterspace,wefindthat（a）thetheoreticalpredictionsfortheBRs,CPAsandthepolarizationfractionsintheSMandthemSUGRAmodelareallconsistentwiththecurrentlyavailabledatawithin±2σerrors;（b）Foralltheconsidereddecays,thesupersymmetriccontributionsinthemSUGRAmodelareverysmall,lessthan7%numerically.ItmaybedifficulttoobservesosmallSUSYcontributionsevenatLHC.

简介：TheHERA-BdataacquisitionandtriggeringsystemsmakeuseofLinuxPCfarmsfortriggeringandonlineeventreconstruction.Wepresentinthispapertherequirements,implementationandperformanceofbothPCfarms.Theyhavebeenfullyworkingduringtheyear2000detectorandtriggercommissioningrun.

简介：WestudyproductionofthetetraquarkstateTccviavirtualphotonattheB-factoriesintheQCDfactorizationframework.WepredictthecrosssectionoftetraquarkstateproductionintheleadingorderattheB-factories.

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简介：InthispaperamethodoftrackreconstructiondevelopedfortheHERA-Bmaintrackingsystemisdiscussed.Themethodbasedonatrackfollowingalgorithmisusedfortrackfindinginthefield-freeareaandforthetrackpropagationthroughtheinhomogeneousmagneticfield.Theperformanceofprogramforsimulatedandrealdataisshown.

简介：AtrackreconstructionprogramCATSbasedonacellularautomatonhasbeendevelopedforthevertexdetectorsystemoftheHERA-BexperimentatDESY,AsegmentmodelofthecellularautomationusedfortrackingcanberegardedaslocaldiscreteformoftheDenby-Petersonneuralnet.Since1999CATShasbeenusedtoreconstructdatacollectedinHERA-B.Resultsonthetrackingperformance,andaccuracyofestimatesandcomputingtimearepresented.

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