lahiri,a first book of quantum field theory(2ed)

《lahiri,a first book of quantum field theory(2ed)》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、PrefacetothesecondeditionTherehasnotbeenanydrasticchangesinthepresentedition.OfcoursesomeofthetypographicalandothersmaHmistakes,postedontheinternetpageforthebook,havebeencorrected.Inaddition,wehaveaddedOCC8S•sionalcommentsandclarificationsatsomeplaces,hopingthatthe

2、ywouldmakethediscussionsmoreaccessibletoabeginner.Theonlyseriousdeparturefromthefirsteditionhasbeenintheno•tationforspinorsolutionsoftheDiracequation.Inthepreviousedition,weputasubscriptonthespinorswhichcorrespondedtotheirhelicities.Inthisedition,wechangethenotatio

3、n'towardswhatismoreconventionaLThisnotationhasbeenintroducedin§4.3andexplainedindetailin§4.6.Wehavereceivedmanyrequestsforpostingtheanswerstotheexercises.Inthisedition,wehaveaddedanswerstosomeexerciseswhichactuallyrequireananswer.Thewebpagefortheerrataofthebookisno

4、wathttp://tnp.saha.ernet.in/~pbpal/books/qft/errata.htmlIfyoufindanymistakeinthepresen~edition,pleaseinformusthroughthiswebpage.Itisapleasuretothankeveryonewhohascontributedtothisbookbypointingouterrorsoraskingforclarifications.Ontheerratapagewehaveacknowledgedallc

5、orrespondencewhichhaveaffectedsomechange.Inparticular,commentsbyC.S.Aulakh,MartinEinhornandScanMurrayweremosthelpful.AmitabhaLahiriPalashB.PalJuly2004PrefacetothefirsteditionIthasbeenknownformorethanfiftyyearsthatQuantumFieldTheoryisnecessaryfordescribingprecisione

6、xperimentsinvolvingelectromagneticinteractions.Withinthelastfewdecadesofthetwentiethcenturyithasalsobecomeclearthattheweakandthestronginteractionsarewelldescribedbyinteractingquantumfields.Althoughitisquitepossiblethatatevensmallerlengthscalessomeotherkindoftheorym

7、aybeoperative,itiscleartodaythatquantumfieldsprovidestheappropriateframeworktodescribeawideclassofphenomenaintheenergyrangecoveredbyallexperimentstodate.Inthisbook,wewantedtointroducethesubjectasabeautifulbutessentiallysimplepieceofmachinerywithawiderangeofapplicat

8、ions.Thisbookismeantasatextbookforadvancedundergraduateorbeginningpost-graduatestudents.Forthisreason,weemploycanonicalquantizationthroughouttheb