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1、Elementaryparticlephysics:TheoriginsValL.FitchPhysicsDepartment,JosephHenryLaboratories,PrincetonUniversity,Princeton,NewJersey08540[S0034-6861(99)02502-7]CONTENTSthenewparticleswerediscoveredincosmicrays,start-ingwithAnderson'spositron.Thosewhobecameinter-I.TheMistsofScotlandS2
2、5estedincosmicraystendedtoberuggedindividualists,II.``CosmicRaysGoDownward,Dr.Anderson''S25tobeiconoclastic,andtomarchtothedrummerintheirIII.OnMakingaParticleTakeaPhotographofItselfS26ownheadsratherthansomedistantone.Afterall,thisIV.TheSlowDiscoveryoftheMesotronS27wastheperiodwh
3、ennuclearphysicswascomingintoitsV.TheMesotronisNottheYukonS28own,itwasthefashionablesubject,itwasthesubjectVI.``EvenaTheoreticianMightbeAbleToDoIt''S28thathadtheattentionofthetheorists,itwasthesubjectVII.TheReservoirofIdeasRunnethOverS29forwhichgreatacceleratorswerebeingbuilt.Th
4、eVIII.``ThereisNoExcellentBeautyThatHathNotcosmic-rayexplorerseschewedallthatandfoundtheirSomeStrangenessintheProportion''S29satisfactionsinwhatmightbecalledthebackwaterofIX.AndSoWasBorntheTau-ThetaPuzzleS30thetime.X.TheCrepuscularYearsforCloudChambersS31GeneralReadingS31Referen
5、cesS32I.THEMISTSOFSCOTLANDWiththestandardmodelsummarizingeverythingthatJustasmodernbiologywaslaunchedwiththeinven-hasbeenlearnedaboutelementaryparticlesinthepasttionofthemicroscope,inphysics,too,areasforinvesti-50to60years,itisperhapsdif®culttorememberthatgationhavebeenopenedwit
6、hthedevelopmentofnewphysicsremainsasubjectthathasitsfoundationsinex-observationaltools.TheWilsoncloudchamberisoneofperiment.Notonlyisitbecauseparticlephysicscanbethese.Whatwouldinspireanyonetowanttostudytheconvenientlyencapsulatedinatheoreticalmodelthatbehaviorofwatervaporunderu
7、nusualconditions?Inwefailtoremember,butitisalsotruethatmostphysicshisNobellectureWilson(1927)answersthequestion.textbooksdevotedtothesubjectandpopularaccountsHiscuriosityaboutthecondensationofwaterdropletsarewrittenbytheoristsandarecoloredwiththeirpar-inmoistairwaspiquedthroughh
8、avingwatchedandticularpointofview.Fromaplethora