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1、April,2002INFN-2002NeutrinosincosmologyA.D.DolgovINFN,sezzionediFerraraviaParadiso,12,44100-Ferrara,Italy1AbstractCosmologicalimplicationsofneutrinosarereviewed.Thefollowingsub-jectsarediscussedatadifferentlevelofscrutiny:cosmologicallimitsonneu-trinomass,neutrinosandprimor
2、dialnucleosynthesis,cosmologicalconstraintsonunstableneutrinos,leptonasymmetryoftheuniverse,impactofneutrinosoncosmicmicrowaveradiation,neutrinosandthelargescalestructureoftheuniverse,neutrinooscillationsintheearlyuniverse,baryo/lepto-genesisandneutrinos,neutrinosandhighen
3、ergycosmicrays,andbrieflysomemoreex-oticsubjects:neutrinoballs,mirrorneutrinos,andneutrinosfromlargeextradimensions.Content1.Introduction2.Neutrinoproperties.3.Basicsofcosmology.arXiv:hep-ph/0202122v219Apr20023.1.Basicequationsandcosmologicalparameters.3.2.Thermodynamicsoft
4、heearlyuniverse.3.3.Kineticequations.3.4.Primordialnucleosynthesis.4.Masslessorlightneutrinos4.1.Gerstein-Zeldovichlimit.4.2.Spectraldistortionofmasslessneutrinos.1Also:ITEP,Bol.Cheremushkinskaya25,Moscow113259,Russia.15.Heavyneutrinos.5.1.Stableneutrinos,mνh<45GeV.5.2.Sta
5、bleneutrinos,mνh>45GeV.6.Neutrinosandprimordialnucleosynthesis.6.1.Boundonthenumberofrelativisticspecies.6.2.Massivestableneutrinos.Boundsonmντ.6.3.Massiveunstableneutrinos.6.4.Right-handedneutrinos.6.5.Magneticmomentofneutrinos.6.6.Neutrinos,lightscalars,andBBN.6.7.Heavys
6、terileneutrinos:cosmologicalboundsanddirectexperiment.7.Variationofprimordialabundancesandleptonasymmetryoftheuniverse.8.Decayingneutrinos.8.1.Introduction.8.2.Cosmicdensityconstraints.8.3.Constraintsonradiativedecaysfromthespectrumofcosmicmicrowavebackgroundradiation.8.4.
7、Cosmicelectromagneticradiation,otherthanCMB.9.AngularanisotropyofCMBandneutrinos.10.Cosmologicalleptonasymmetry.10.1.Introduction.10.2.Cosmologicalevolutionofstronglydegenerateneutrinos.10.3.Degenerateneutrinosandprimordialnucleosynthesis.10.4.Degenerateneutrinosandlargesc
8、alestructure.11.4.NeutrinodegeneracyandCMBR.211.Neutrinos,darkmatterandlargescalestructur
