Dcynrttile~~t r,J'Phy.sir.s. Mc,Mrr,s(e~. Urri\~er..si!\., H(rrrriliorr, Orrt., Ctr~rrrrlrr LRS 411111 AND AKIKA SUZUKI AN11 N A~K O YAMANISHI Dopot-ttrwt~t of Pl~jsic.s, Scierlc.e Ur~ir~er:si!\. of Tokyo, Ktrg~ovl:rrkr~. Tokjo 162, Jol)trn Rcccivcd January 8. 1984As pointcd out carlicr, thc pion-quark interaction bascd on a bag modcl with a sharp, fixed surfacc givcs rise to thc divcrgcncc of various quantities such as thc nucleon sclf-cncrgy. This is duc to quark excitation in thc intcrmcdiatc statcs. Wc cxarninc how this difficulty can bc rnodcratcd in a "fuzzy bag rnotlcl" in which thc surface is sn~carcd. Thc nuclcon sclf-cncrgy due to pion interaction convcrgcs in thc fuzzy bag n~odcl. Wc find, howcvcr, that thc convcrgcncc is quitc slow, and thc contribution of proccsscs such as r / q pair creation, which havc not bccn considered in carlicr calculations. is vcry important.Commc on I'a dCji hit rcmarqucr, I'intcraction pion-quark baskc sur un rnodtle dc sac avcc unc surfacc fixc bicn dCfinic donnc licu i la divcrgcncc dc divcrscs quantitCs tcllcs quc I'auto-Cncrgic du nuclton. Ccci cst dli : I I'cxcitation tlu quark dans lcs Ctats intcrmediaircs. Nous cxanlinons comrncnt ccttc difficulti. pcut Etrc attdnuCc dans un "~ncldtlc dc sac flou" oh la surfacc cst cston~pic. Dans cc nouvcau rnodtlc, I'auto-Cncrgic du nuclCon tluc i I'intcraction avcc Ic pion convcrgc. Nous trouvons ccpcndant quc la convcrgcncc cst trts Icntc, ct quc dcs proccssus tcls quc la crCation dc paircs (/I/, qu'on n'avait pas considCrds dans Ics calculs antdricurs, apportcnt dcs contributions importantcs.[Traduit par lc journal]
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