量子场论：第1卷

Whyanotherbookonquantumfieldtheory?Todaythestudentofquantumfieldtheorycanchoosefromamongascoreofexcellentbooks，severalofthemquiteup-to-date.Anotherbookwillbeworthwhileonlyifitofferssomethingnewincontentorperspective.Astocontent，althoughthisbookcontainsagoodamountofnewmaterial，Isupposethemostdistinctivethingaboutitisitsgenerality;Ihavetriedthroughouttodiscussmattersinacontextthatisasgeneralaspossible.Thisisinpartbecausequantumfieldtheoryhasfoundapplicationsfarremovedfromthesceneofitsoldsuccesses，quantumelectrodynamics，butevenmorebecauseIthinkthatthisgeneralitywillhelptokeeptheimportantpointsfrombeingsubmergedinthetechnicalitiesofspecifictheories.Ofcourse，specificexamplesarefrequentlyusedtoillustrategeneralpoints，examplesthatarechosenfromcontemporaryparticlephysicsornuclearphysicsaswellasfromquantumelectrodynamics.Itis，however，theperspectiveofthisbook，ratherthanitscontent，thatprovidedmychiefmotivationinwritingit.Iaimtopresentquantumfieldtheoryinamannerthatwillgivethereadertheclearestpossibleideaofwhythistheorytakestheformitdoes，andwhyinthisformitdoessuchagoodjobofdescribingtherealworld.