学科分类
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347 个结果
  • 简介:最小的dilaton模型(MDM)由叫的dilaton和dilaton顶夸克搭挡把t'称为的一汗衫数量扩大标准模型。在这个工作,我们调查t'-induced放射的修正到Higgs-strahlung生产过程e+在未来Higgs的eZh工厂。我们首先详细介绍分析计算并且显示出怎么处理紫外分叉。然后,我们由从精确electroweak数据考虑限制数字地计算修正。我们发现那,为罪恶L=0.2并且mt'=1200GeV,修正是0.26%和2.1%为,1TeV分别地,并且更大的价值能作为罪恶L增加。

  • 标签: 辐射修正 型号 辐射校正 数值计算 标准模型 合作伙伴
  • 简介:Numericalestimatesforelectronsandmesonsparticle–antiparticlecreationfromvacuuminthepresenceofstrongelectromagneticfieldsarederived,usingthecompleteprobabilitydensityrelationofPopov’simaginarytimemethod(Popov,JETPLett.13,185(1971);Sov.Phys.JETP34,709(1972);Sov.Phys.JETP35,659(1972);PopovandMarinov,Sov.J.Nucl.Phys.16,449(1973);JETPLett.18,255(1974);Sov.J.Nucl.Phys.19,584(1974));(Popov,Phys.Let.A298,83(2002)),andwithintheframeworkofanexperimentalsetupliketheE144(Burkeetal.,Phys.Rev.Lett.79,1626(1997)).Theexistenceofcrossingpointamongpaircreationefficiencycurvesofdifferentphotonenergiesandtheroleofodd/evenmultiphotonordersintheproductionratesarediscussed.Finallyakindoftunabilityprocessbetweenthetwocreationprocessesisdiscussed.

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  • 简介:Itisidentifiedthatbarelypassingelectronsarethedriveofthee-Gshbones,ratherthanthebarelytrappedelectronsatlowfrequency.Thefrequencyjumpine-Bshboneexperimentsisreproducedandanalyzed.Itisfoundthatthee-Bshbonefrequencyincreaseswiththehotelectronenergy,whichisconsistentwiththeexperiments.Thegrowthrateofthemode(m=2,n=2)isgreaterthanthatofthemode(m=1,n=1).

  • 标签: 实验 鱼刺 频率 跃变 捕获电子 电子能量
  • 简介:Afusionbreedermightbeanessentialintermediateapplicationoffusionenergyatearlierterm,sinceithasthepotentialtoprovideplentyofcommercialfissilefuel.Basedonfusionphysicsandtechnologiesavailableatpresentandinthenearfuture,therealisticfusionexperimentalbreeder,FEB-Ewasdesigned.

  • 标签: 放射化计算 核聚变实验 增殖堆 FEB-E 中子通量
  • 简介:Inthecontextofthetop-color-assistedtechnicolor(TC2)model,theflavor-changingneutral-current(FCNC)interactioninducedbythetop-higgs(h_t~0)arepredictedattreelevel.Westudytherelevantprocessesofe~+e~-(γγ)→th_t~0attheInternationalLinearCollider(ILC).ItisfoundthattheserareprocessesproductionratescanbeenhancedsignificantlyintheTC2model.Especiallyfortheprocessγγ→th_t~0,thetotalcrosssectionwillreachafewfbinthereasonableparameterspace.Wealsocalculatethedistributionsoftransversemomenta,pseudo-rapidandinvariantmassofthetop-higgs.Inviewofthemaindecaymodesoftop-higgsform_(h_t~0)<2m_t,weEndthattherewillbeseveralhundredsFCNCeventsproducedattheILCwithannuallyintegralluminosityof500fb~(-1).Duetothecleanbackground,suchFCNCsignalscanpossiblybedetectedattheILC.

  • 标签: TC2模型 电流信号 电子邮件 中性 国际直线对撞机 风味
  • 简介:在n+~(10)B反应,~5He簇排放与更新的水平计划和新光模型被讨论了参数。在这篇论文,与~5He排放有关的反应隧道详细被列出。由为轻原子核使用新反应模型,为n+~(10)的全部的出去的中子的thedouble微分的生气的节在E_n=14.2兆电子伏的B反应被计算了,并且结果与大小相当同意很好。特别地,在精力尖的系列,对全部的出去的中子双differential十字节的从~5He排放的贡献也被分析了,并且在14.2兆电子伏被给了的E_n=的60°的partialenergy尖的系列。一旦~5He排放被考虑,计算结果显示那,有在低精力区域的全部的出去的中子的double-differentialmeasurements的试穿能被改进。因此,在轻原子核的反应过程适当地认为~是5He排放是必要的。

  • 标签: ^ 5He发射 双微分交叉段 预平衡发射 反作用通道 中子
  • 简介:Thestructuralproperties,mechanicalbehavior,andelectronicstructureofthenewlydevelopeddiamondlikeBC5(d-BC5)wasinvestigatedusingdensityfunctionaltheory(DFT)calculations.Theresultsindicatethatd-BC5hasgreatbulkmodulusof393GPa,largeshearmodulusof398GPa,andhighhardnessof62Pa,andthussupportthefactthatd-BC5isanultra-incompressibleandsuperhardmaterial.Remarkably,thesuperhardd-BC5exhibitsmetallicfeatures.Furthermore,thetrendthatthemechanicalbehaviorfallswiththeincreaseofboroncontentwasrevealed.Thecombinationofhugestiffness,highhardness,andgoodmetallicitymakesseriesofdiamondlikeBCx(d-BCx)validforwiderapplicationsincomparisonwithpurediamond.

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  • 简介:Inthepresentstudy,astatisticalinvestigationiscarriedouttoexplorewhetherthereisarelationshipbetweenthecriticalfrequency(foEs)ofthesporadic-ElayerthatisoccasionallyseenontheEregionoftheionosphereandthequasibiennialoscillation(QBO)thatflowsintheeast–westdirectionintheequatorialstratosphere.Multipleregressionmodelasastatisticaltoolwasusedtodeterminetherelationshipbetweenvariables.Inthismodel,thestationarityofthevariables(foEsandQBO)wasfirstlyanalyzedforeachstation(CocosIsland,Gibilmanna,NiueIsland,andTahiti).Then,acointegrationtestwasmadetodeterminetheexistenceofalong-termrelationshipbetweenQBOandfoEs.Afterverifyingthepresenceofalong-termrelationshipbetweenthevariables,themagnitudeoftherelationshipbetweenvariableswasfurtherdeterminedusingthemultipleregressionmodel.Asaresult,itisconcludedthatthevariationsinfoEswereexplainablewithQBOmeasuredat10hPaaltitudeattherateof69%,94%,79%,and58%forCocosIsland,Gibilmanna,NiueIsland,andTahitistations,respectively.ItisobservedthatthevariationsinfoEswereexplainablewithQBOmeasuredat70hPaaltitudeattherateof66%,69%,53%,and47%forCocosIsland,Gibilmanna,NiueIsland,andTahitistations,respectively.

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  • 简介:Inthispaperwepresentanovelnanoantenna(nantenna)designforenergyharvesting.Thenantennahasan'E'shapeandisplacedonaSiO2substrate.ItsoperationisbasedontheexcitationofsurfaceplasmonpolaritonsthroughthegoldarmsoftheEshape.Byvaryingthelengthsandwidthsofthearms,twooverlappingworkingbandwidthscanbeachieved.Thisresultsinawidebandbehaviorcharacterizedbyafullwidthathalf-maximumofabout2.2μmcenteredaround3.6μm.TwoorthogonalEnantennasareplacedperpendiculartoeachothertorealizeadual-polarizednantenna.Thisnantennacanreceivethetwoincidentpolarizationsattwoseparategaplocationswithveryhighisolation.Theproposedstructurecanbeusedinseveralenergyharvestingapplications,suchasscavengingtheinfraredheatfromtheEarthandotherhotobjects,inadditiontoopticalcommunications.

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  • 简介:Today,e-mailhasbecomepartofcommunication,andisthecoreofinformationpublicationamongtheenterprises.Soastocanreachtherapid,low-costandreliableemaildemand,manycompaniesandindividualsusetheserviceofferedbyLinuxasthesolutionsatisfyingthedemands.SondmailisafreewarewhichactsasmailserverinLinux.Theage-olddevelopmenthistoryofSendmailensuresitstransplantability,stabilityandthetechniquesupport.

  • 标签: 电子邮件 传递服务器 SENDMAIL LINUX 技术支持
  • 简介:A New E3 Transition from 9+ Isomer in 144Pm NucleusANewE3Transitionfrom9+Isomerin144PmNucleus¥ZhangYuhu;Y.Gono;ZhaoQinz...

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  • 简介:Veryrecently,BelleannouncedtheirobservationofΥ(5S)!bJ!(J=0;1;2),indicatingthattheΥ(5S)!bJ!decaysalsohavelargedecaywidths,i.e.,themeasuredbranchratiosofΥ(5S)!bJ!are<3:410??3,(1:640:23+0:30??0:22)10??3,and(0:570:220:07)10??3withJ=0;1;2,respectively[1].ItshouldbenoticedthateventhoughthetreelevelcontributionstoΥ(5S)!bJ!(J=0;1;2)shouldbestronglysuppressedduetotheOkubo-Zweig-Iizuka(OZI)rule,suchlargedecaywidthsareobserved,whichagaininspiresourinterestinunderstandingsuchquantities.Inthiswork,weproposethatthecontributionfromthehadronicloopshouldbeconsideredinstudyingΥ(5S)!bJ!.

  • 标签: LOOP LOOP BE OUR IT
  • 简介:Wepropose,inthispaper,touseseveralmultivariateanalysismethodeandanewkindofvariablestoseparatebetweenfourclassesofeventsproducedatLEP2:theeventswith2jets,3jets,4jetsandthosehavingamoreabundantjettopology(njets,n>4)Neuralnetworkhaveproventhemselvestobemoreefficientclassifierthantheothertechniques.Theefficienciesandpuritiesachievedwiththeoptimizedneuralnetworkareinaverage1to7%higherthanthoseobtaindwiththeothermethods.

  • 标签: e^+e^-碰撞实验 神经网络 喷射注数
  • 简介:隐藏的对称和一个无限的集合广告5S5上的格林Schwarz超弦的非局部的保存水流被Bena等指出了。在这篇论文,我们证明在MaurerCartan方程和运动的方程之间双的农夫在格林Schwarz超弦的moduli空格给隐藏的对称。因此由扭曲的转变vielbeins,我们能表示纸的水流[我。Bena,J。Polchinski,和R。Roiban,Phys。加快。D69(2004)046002]作为宽松的连接由一唯一光谱参数。

  • 标签: 超粒子 Hodge对偶 隐藏对称 分子物理学