1、遼寧師范大學(xué)Y931327碩士研究生學(xué)位論文論文題髫:矢量介子交換效應(yīng)磷究研究生:佟營指導(dǎo)教萍:戴連榮學(xué)群專鼗:毽論秘鬻(棱鑲理)年綴:2003級遼寧搏蔻大學(xué)氍究生隗2006年5月TheStudiesofEffectofVectorMesonExchangeGraduateStudent:TongLeiThesisAdvisor:DaiLianrongAbstract:TheextendedchiralSU(3)quarkmodelha
2、sbeenproposedtostudythedifferentshort—rangeinteractionBasedonchiralsu(3)quarkmodelcouplingsamongvectormesonfieldswithquarksisconsideredinthisextendedchiralSU(31quarkmodel。The_rearetotallydifferentshort—rangemechanismsint
3、histwomodelsTheOGEisresponsiblefortheshort—rangemechanisminthechirMSU(3)quarkmodel,andvectormesonchangeeffectgovernsshort—rangemechanismintheextendedchi[alsu(a)quarkmodelIntheextendedchiralSU(3)quarkmodel,thepossiblediba
4、ryoncandidatesarepredictedwithintheframeworkofresonatinggroupmethod(RGM)WeusethesalilesetsofparamaterswhichhavebeensuccessfullyemployedintheresearchofN—Nscatteringphaseshiftsanddeuteronboundstate,tostudynon—strangenessda
5、ndstrangenesss=一3△n(s=3,T=3/2)dibaryonsTheresultsshow,comparedtochiralSU(3)quarkmodel,thebindingenergiesofdand△nwillbeenhancedintheextendedchiralSU(31quarkmodelbecausethevectormesonexchangeoffermoreattractiveforcetothemH
6、owever,thepredictionof△nisaweakbounddibaryonstateabovethethresholdofN“nEventhoughweconsiderthehiddencolorchannelthebindingenergyofd‘isstillabovethethresholdof△Ⅳ”whichisverydifferentwiththepredictionofdeeplybounddibaryons
7、tatebelowthethresholdofNN,rrinothermodelInordertobestourmodel:wealsogiveananalysisofthelowestexcitedstatesN‘(1520)andN(1535)ofnucleonwithnegtiveparityTheresultsshow,comparedtochiralSU(3)quarkmodel,theN4(1520)andN8(1535)s