arXiv:hep-ph/9908366 v1 16 Aug ?ectiveTheoryPart1BUDKERINP92-97NOVOSIBIRSK1992IntroductiontotheHeavyQuarkE?,2BudkerInstituteofNuclearPhysics,630090Novosibirsk90,RussiaABSTRACTHeavyQuarkE?ectiveTheory(HQET)-imation,theheavyquarkisconsideredasastaticsourceofthegluon?eld;1/,inparticular,toobtainre-??ectivelagrangian,mesons,baryons,-tions,nonleptonicdecays,:******@?ectiveLagrangianRecentlyaninterestingnewapproachtoQCDproblemsinvolvingaheavyquarkwasproposed,namelytheHeavyQuarkE?ectiveTheory(HQET).Intheleadingapproximation,theheavyquarkisconsideredasastaticsourceofthegluon?eld;1/?,inparticular,,inQCDevensuchasimpli?[1,2,3]’,–3;’sstartfromtheQCDLagrangianL=Q(ibD?m)Q+qibDq?14GaμνGaμν+···()whereQistheheavyquark?eld,qarelightquark?eld
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