光錐哈密頓量方法及其在介子系統(tǒng)中的應(yīng)用.pdf

1、蘭州大學(xué)博士學(xué)位論文光錐哈密頓量方法及其在介子系統(tǒng)中的應(yīng)用姓名：黎雷申請學(xué)位級別：博士專業(yè)：粒子物理與原子核物理指導(dǎo)教師：王順金20060501AbstractBecauseofsomeuniquefeaturesjparticularlytheapparentsimplic—ityofthelight—conevacnulTllthelight—coneHanliltonianapproachbasedonlight—conequan

2、tizationofquantumfieldtheoryisapromisingmethodforthebound—stateproblemofrelativisticcompositesystemsStartingfromtheQCDLagrangiandensityanddisregardingthezeromodesinlight—coneQCD，Paulieta1havederivednon—perturbativelyanef

3、fec—rivelight—coneHamiltonianofmesonswhichactonlyontheqqsectorThefrontformmesoneigenequationsareformulatedillmomentum—helicityrepresentationwhichhindersitssolutionintotalangularino—mentumrepresentationSowetransformittoto

4、talangularmomen—tmnrepresentationininstantformandexplorethephysicalcontentsofthemesonradialeigenequationsThenthemassspectraoffortyflavoroffdiagonalmesonsconsistingof(札】djs，C】b)quarksandsixmesonsconsistingofheavyquarkscia

5、ndbbarecalculatedrelativisticallyandnonperturbativelyNumericalresultsshowthatthislight—coneQCDeffectiveHamiltonianwithoutconfiningpotentialsandflavormixingin—teractionscanwelldescribethegroundstatesbutcannotapplyfortheex

6、citedstatesofmesonsandflavordiagonallightmesonsSincetheprob—lemofconfinementrelatedtozeromodesisunsolveinlight—coneQCD)weintroducearelativisticconfiningpotentialfromphenomenologicalre—sultsintothemesonHamiltonianWiththis