资源描述：
《string theory, supersymmetry, unification, and all that》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、Stringtheory,supersymmetry,uni®cation,andallthatJohnH.Schwarz*CaliforniaInstituteofTechnology,Pasadena,California91125†NathanSeibergInstituteforAdvancedStudy,Princeton,NewJersey08540Stringtheoryandsupersymmetryaretheoreticalideasthatgobeyondthestandardmodelof
2、particlephysicsandshowpromiseforunifyingallforces.Afterabriefintroductiontosupersymmetry,theauthorsdiscusstheprospectsforitsexperimentaldiscoveryinthenearfuture.Theythenshowhowthemagicofsupersymmetryallowsustosolvecertainquantum®eldtheoriesexactly,thusleading
3、tonewinsightsabout®eldtheorydynamicsrelatedtoelectric-magneticduality.Thediscussionofsuperstringtheorystartswithitsperturbationexpansion,whichexhibitsnewfeaturesincluding``stringygeometry.''Theauthorsthenturntomorerecentnonperturbativedevelopments.Usingnewdua
4、lities,allknownsuperstringtheoriesareuni®ed,andtheirstrong-couplingbehaviorisclari®ed.Acentralingredientistheexistenceofextendedobjectscalledbranes.[S0034-6861(99)01402-6]I.INTRODUCTIONovercomestheproblemofperturbativenonrenormaliz-ability.Arelativistmightpoi
5、nttoadifferentsetofprob-Thestandardmodelofparticlephysics(seethearticlelemsincludingtheissueofhowtounderstandthecausalbyGaillard,Grannis,andSciulliinthisvolume)isastructureofspace-timewhenthemetrichasquantum-beautifultheorythataccountsforallknownphenomenamech
6、anical¯uctuations.Therearealsoahostofprob-uptoenergiesoforder100GeV.Itsconsistencyrelieslemsassociatedwithblackholes,suchasthefundamen-ontheintricaciesofquantum®eldtheory(seeWilczek'staloriginoftheirthermodynamicpropertiesandanarticle),anditsagreementwithexpe
7、rimentisspectacu-apparentlossofquantumcoherence.Thelatter,iftrue,lar.However,therearemanyopenproblemswiththewouldimplyabreakdowninthebasicstructureofquan-standardmodel.Inparticular,wewouldliketoknowtummechanics.Therelativist'ssetofissuescannotbewhatliesbeyond
8、thestandardmodel.Whatisthephys-addressedproperlyinaperturbativesetup,butrecenticsatenergiesabove100GeV?discoveriesareleadingtononperturbativeunderstand-Onesuggestionforphysicsatnearbyener
