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- W3106209679 abstract "We investigate the issue of how accurately we can constrain the lepton number asymmetry xi_nu = mu_nu/T_nu in the Universe by using future observations of 21 cm line fluctuations and cosmic microwave background (CMB). We find that combinations of the 21 cm line and the CMB observations can constrain the lepton asymmetry better than big-bang nucleosynthesis (BBN). Additionally, we also discuss constraints on xi_nu in the presence of some extra radiation, and show that the 21 cm line observations can substantially improve the constraints obtained by CMB alone, and allow us to distinguish the effects of the lepton asymmetry from the ones of extra radiation." @default.
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- W3106209679 date "2014-09-05" @default.
- W3106209679 modified "2023-09-24" @default.
- W3106209679 title "Probing lepton asymmetry with 21 cm fluctuations" @default.
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- W3106209679 doi "https://doi.org/10.1088/1475-7516/2014/09/014" @default.
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