In study of dark matter density distributions,there are three types of dark matter halo distributions of galaxies and clusters of galaxies.The NFW(Navarro-Frenk-White)profile[1]ρ(r)NFW=ρ0/(r/rr0)(1+(r/rs))^2(1),wher...In study of dark matter density distributions,there are three types of dark matter halo distributions of galaxies and clusters of galaxies.The NFW(Navarro-Frenk-White)profile[1]ρ(r)NFW=ρ0/(r/rr0)(1+(r/rs))^2(1),whereρ0 and rs are paramenters from halo to halo.The Burkert profile isρ(r)Burkert=ρ0/(1+r/r0)(1+(r/r0)^2),and isothermal profileρ(r)ISO=ρ0/(1+(r/rs))^2,whereρ0,r0 is the center density and radius of dark matter halos.The curves of(1),(2)and(3)are shown in Fig.1.Fig.1 shows that there exist the cored density profile and cuspy problem in the Burkert profile,Quasi ISo profile and NFW profile.展开更多
Higgs Portal dark matter have been supposed due to the two facts that dark matter has a gravitational force and has no strong interaction and electromagnetic interaction.A natural logic is the possibility of hiding da...Higgs Portal dark matter have been supposed due to the two facts that dark matter has a gravitational force and has no strong interaction and electromagnetic interaction.A natural logic is the possibility of hiding dark matter.That is,the dark matter does not have the interaction of standard model.Dark matter may be hidden sector.The standard model particles are in the visible sector.The Higgs sector of the Standard Model enjoys a special feature that it can couple to the hidden sector at the renormalizable level.Ref.[1]has discussed the relationship between the standard model and hidden sector.Let H be Higgs field andΦ,be the“hidden Higgs field”in hidden sector.There are a“Higgs portal”interaction term between H andΦas Vportal=λhΦH+HΦ+Φ.展开更多
基金National Natural Science Foundation of China(11205221).
文摘In study of dark matter density distributions,there are three types of dark matter halo distributions of galaxies and clusters of galaxies.The NFW(Navarro-Frenk-White)profile[1]ρ(r)NFW=ρ0/(r/rr0)(1+(r/rs))^2(1),whereρ0 and rs are paramenters from halo to halo.The Burkert profile isρ(r)Burkert=ρ0/(1+r/r0)(1+(r/r0)^2),and isothermal profileρ(r)ISO=ρ0/(1+(r/rs))^2,whereρ0,r0 is the center density and radius of dark matter halos.The curves of(1),(2)and(3)are shown in Fig.1.Fig.1 shows that there exist the cored density profile and cuspy problem in the Burkert profile,Quasi ISo profile and NFW profile.
基金National Natural Science Foundation of China(11205221)。
文摘Higgs Portal dark matter have been supposed due to the two facts that dark matter has a gravitational force and has no strong interaction and electromagnetic interaction.A natural logic is the possibility of hiding dark matter.That is,the dark matter does not have the interaction of standard model.Dark matter may be hidden sector.The standard model particles are in the visible sector.The Higgs sector of the Standard Model enjoys a special feature that it can couple to the hidden sector at the renormalizable level.Ref.[1]has discussed the relationship between the standard model and hidden sector.Let H be Higgs field andΦ,be the“hidden Higgs field”in hidden sector.There are a“Higgs portal”interaction term between H andΦas Vportal=λhΦH+HΦ+Φ.
