具有T宇稱的最小Higgs模型(LHT)與單個頂夸克的產(chǎn)生和衰變.pdf

1、遼寧師范大學(xué)碩士學(xué)位論文具有T宇稱的最小Higgs模型（LHT）與單個頂夸克的產(chǎn)生和衰變姓名：聞佳申請學(xué)位級別：碩士專業(yè)：理論物理指導(dǎo)教師：岳崇興20090501具有T宇稱的最小Higgs模型(LHD與單個頂夸克的產(chǎn)生和衰變AbstractContent：Thestandardmodel(SM)isoneofthegreatestachievementsinphysicsSMofelementaryparticleshasachieve

2、dmuchSuccessHoweveritsuffersfromtheproblemsoftOOmanyfreeparameters，trivialityandunnaturalness，ctcAlso，therearesomedeviationsfromexperimentaldataThus，PeopleusuallytaketheSMasalowenergyeffectivethemyThelittleHiggstheoryisO

3、nepopularIIewphysicsThemotivafionofthistheoryistOsolvetheproblemofunnaturalnessinthesMButitstillsuffersfromsevereconstraintsfromprecisionelectroweakmeasurementwhichcouldonlybesatisfiedbyfinerunningthemodelparametersToavo

4、idthisproblemTparityhasbeenintroducedwhichformssocalledLHTmodelTheLHTmodelisOneoftheattractivetittleHiggsmodelsmostofworksofthisarticlearedoneinthismodelLHTmodelpredictssomenewparticleswhichplayallimportantroleininvestig

5、atingthen跚rphysicsAsweknowtopquarkistheheaviestelementaryparticleItsmassisclosetotheelectroweakbreakingscale，anditcanalmostlycoupletoalltheparticlesTherefore，topquarkcallopenawindowtonewphysicsTheflavorchangingneutralcur

6、mnt(FCNC)interactionsrelativetothetopquarkCallbegeneratedatonelooplevelwhilesuppressedbytheGIMmechanismsiIK：esuchprocesscanbeenhancedgreatlybysomeIlewphysicsitcanbeagoodwaytoinvestigatethel踟physicsBothsingletopproduction

7、andtopdecaysCanbeverygoodprocessestesearchthetopquarkFCNCF婦妙，westIldythesingletopproductioninepcoHidecBasedoncalculatingthecontributionsofLHTtotheanomaloustopcoupfingtqT(q=u，c)，weconsidersingletopproductionviathetchannel

8、partonicprocesse口_etWithreasonablevaluesoftheparametersintheLHTmodel，theproductioncrosssectioncanreachO14fbatTHERAwith∥=1TeVffweassumethattheTHERAcolliderhasayearlyintegratedluminosityofP=lOO／b一1therewillbeseveraltensofs

9、ingletopeventsgeneratedThentheeffectsoftheLHTmodelonsingletopquarkproductioncanbedetectedinfutureattheTHERAAdditionallyweconsiderthe斌topdecayst。qhandt一曠(口=t‘，c)inthecontextofLHTmodelAlthoughwefindthattheLHTmodelcansignif

10、icantlyenhanc圮thevaluesofthebranchingratiosB(t。qh)andB(t’口r_)withrespecttothosepredictedbySM，whichcaIIreach10—6and10～respectivelyThesevaluesarestillbelowtheorderofsensitivityoftheupcomingLHCexperimentsKeywords：LHTmodel，t