暴涨宇宙学与暗能量.ppt

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1、DarkEnergyanditsconnectionstoNeutrinos,BaryogenesisandDarkMatterXinminZhangInstituteofHighEnergyPhysics,BeijingP.R.ChinaConcordancemodeloftheCosmology:InflationOutlineofthetalkI.BriefreviewontheconstraintsontheDarkEnergyII.AnewscenarioofDarkEnergymodel:QuintomIII.InteractingDa

2、rkEnergy:a)Connectiontoneutrinos:MassvaryingNeutrinosb)ConnectiontoBaryogenesis:QuintessentialLeptogenesisc)ConnectiontoDarkmatter:NeutralinomassvaryingSUSYinginteractingDE:QuintessinoDarkmatterIV.SummaryDarkEnergy:*Negativepressure:*Smoothlydistributed,(almost)notclusteringCand

3、idates:*Cosmologicalconstant(orvacuumEnergy)But:,cosmologicalconstantproblem!*DynamicalField:Quintessence,K-essence,PhantometcI.ConstraintsontheDarkEnergyAquantitycharacterizingthepropertyofDarkEnergy:Equationofstate:w(Z)=P/ρForexample:*VacuumEnergy:w=-1*Quintessence:*Phantom:Usi

4、ngtherecent157SupernovadatapublishedbyRiessetal.astro-ph/0402512*At2σ,thecosmologicalconstantfitswellthedata*DatamildlyfavourarunningoftheWacross-1Modelindependentanalysiswiththefollowingparameterization：1，w(z)=w_0+w_1*z2，w(z)=w_1+w_a*z/(1+z)(E.Linder)Feng,Wang&X.ZhangAstro-ph/04

5、04224Huterer&CoorayAstro-ph/0404062astro-ph/0407259,SteenHannestad,EdvardMortsellProbingDarkEnergywithSupernovae:aconcordantoraconvergentmodel?Authors:J.-M.Virey,A.Ealet,C.Tao,A.Tilquin,A.Bonissent,D.Fouchez,P.Taxil,astro-ph/0407452Twocomments:1.Parameterizationdependent2.Effects

6、ofperturbationsAstro-ph/0507170W1=20Astro-ph/0507482II.ThenewscenarioofDarkEnergy:QuintomIftherunningofw(Z),especiallyatransitionacross–1,confirmedinthefuture,bigchallengetothemodelbuilding*Vacuum:w=-1*Quintessence:*Phantom:*K-essence:orbutcannotacross-1(Vikman:astro-ph/0407107)A

7、newscenanioofDarkEnergy:Quintom(Zhangetal.Astro-ph/0404224)Forex:singlescalar:multi-scalar:Detailedstudyon:Two-fieldmodelsofQuintomDarkEnergy-Xiao-feiZhang,HongLi,YunsongPiaoandXinminZhangI.Quintommodelwithtwoscalarfields:II.QuintommodelwithPhantomfieldandneutrino:Astro-ph/050165

8、2Important:NeutrinomassvaryTheconstraint