在TC2模型下研究top夸克衰變到極化的W玻色子.pdf

1、河南師范大學碩士學位論文在TC2模型下研究top夸克衰變到極化的W玻色子姓名：張巧麗申請學位級別：碩士專業(yè)：理論物理指導教師：王學雷20050501AbstractThest鋤dardModel(SM)isasuccessfLllpillarofatheorytodesc曲et11efundmentalpar七iclesIthasbeentestedbyalotofexperimemNosi印mcantexperimentaldevia

2、tionsfmmthesMh刪eyetbeenfouIldTheprecisionmeaswememoftheU三PcanproVjdeaVerysensn～etesttopossbledeviati011stllroughradiativecorrec廿ons，HoweVeLniswellkno、vnthattheSMstillcomainssomet11eoreticalpmblems，ie，itcannotproVidedynam

3、icsreasonfbrt11egenerationofmassesFurthermore，t11eHiggssectorwhichisintroducedtoexpainelectroweaksymmetrybreaking(EwsB)suff色rsf而mt11eproblemsoftrivialitya11dunnatumlnessso，peoplethinktheremaybenewphysicsbeyondthestandard

4、ModelThetechnicolo“TC)t11eoryisoneoftlleimporcantpmmisingcandidatesofnewphysicsInthisp印etwenrstlyreViewthetopc010r_aSsistedtechnc010“TC2)modelwhichisapopularmeoryint11eTCmodelsTC2modelpredictssomenewmassivegaugebosonsand

5、scalarsandt11esepaniclescaIlc伽塒butetosomephysicalobservablesT0pquarkistheheaviestpanicleyetdiscoVered，itcouplesmorestmnglytotheEwsBsectorthanthe1i出quarks，therefore，meprocessesincludingmetopquarkisVerysensmVetothenewphysi

6、csThus，thctopqua出issin91edouttoplay鋤importamroleinprobingthenewphysicsIntllispaper，wealsosummarizetopphysicsTheTc2modelmayhaverichertopquarkphenomenologythanothefnewphysicsmodelssjncethetopquarkcondensationmal(et11et叩qua

7、rkdi髓rentfromotherfbmionsAnhoughVariousexOticproductionprocessesa11draredecaymodesof血etopquarkwillse“easmbusteVidencesfornewphysics，t11er01eofthedomin趴tdecaymodef斗脅inpmbingnewphysicsshouldnotbeuIlderestimacedPe叩1ehavedee

8、plystudiedf—彬舀inthesM柚dotllernewphysicsmodcls(suchas：MSSM)In也isp印etwestudytopquarkdecayingintopolarizedW_bosoninTC2modelwhichmaypmVideValuabletheoricalguid柚ceforexperimemtopmbephysjcalsignalsoftheTc2model_Intheworkpa鞏、ve

9、calculatetheoneloopco仃ectionofmeTc2modeltothedecaywidthrO—玎碭)wefindthattheTc2correctiontotIledecaywidtllrO—手冊)isminusa11dgeneralIyseveralpercentin橢eallowedparamcterspacesThemaxmlumValueoftllecorrectioncanreach8％，whichjsc