矢量介子交換效應(yīng)研究.pdf

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