1、含b夸克的介子一重子體系中反常交換項的貢獻專業(yè)名稱：理論物理申請人：覃莉指導教師：沈彭年研究員梁偉紅教授論文答辯委員會主席：委員：聾上一AnomalouscontributionofthebaryonstateswithOPenbeauty一一LiQinSupervisor：PoffPengnianShenProfWeihongLiangDepartmentofPhysics，GuangxiNormalUniversity，Guilin

2、541004AbstractInrecentyears，theLHCbCollaborationreportedthatAbexcitedstatesA；havebeenfound，andnamedthemAb(5912)andAb(5920)Inthispaper，thecouple—channelBSequationisusedtostudythemeson—baryonscatteringsinI=0，C=0，S=0，B=一1se

3、ctors，includingpseudoscalarbaryoninteractionandvectorbaryoninter—actionUnderthestronginteractionthetotalangularmomentumJ，theisospinIanditsthirdcomponentIs，thestrangenessS，thecharmC，thebottomBandtheparityPofscatteringsyst

4、emareconservedSotherearethreecouplechannelsinJP=1／2一ofpseudoscalar—baryoninteraction：BN，丌∑6and叼A6，andforJP=3／2一，thereisonlyonechannel：1rE；AndtherearefourcouplechannelsinJP=1／2一JP=3／／2～ofvector—baryoninteraction：BN，pEb，wA

5、bandCAbInthispaper，thelowestorderamplitudesarecalculatedbytheLagrangianofthecorrespondingvertex，andobtainingthetotalamplitudesatisfiedtheunitaryrelationbycoupled—channelBSequationSearchingthebaryonresonancewithopenbeauty

6、inscattering，andcalculatingthecouplingcon—stantstovariouschannelstofindconstituentofvariousstatesWewilldealwiththedivergenceofoneloopintegralinthree—momentumcut—offregularizationmethodThecut—offgmo$istheonlyfreeparameter

7、inourcalculationCorrespondingtothedifferentqmaxtheresultdifferlittleSo，theresultsarenotsensitivetothevalueofqm口$Thevector—baryoninteractioninI=0，C=0，S=0，B=一1sectors，considerthefullCOU—pledchannelwiththeanomalousterm：BN，7

8、fEb，1fEb，BN，pEb，wAbandwAbFivebary—onresonanceswithopenbeautyaregenerateddynamicallyinthescattering，twoforJP=3／2一：A：1’(M=592057MeV，F(xiàn)=o)andA12’(M=638707MeV，r：82)；andfourforJP=1／2一are：A3’(M=591059MeV，F(xiàn)=o)、Ar’(M=59637MeV，r=8