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The drag-epoch redshiftz drag is com- puted using the approximation described in [?]

Here,D M denotes the transverse comoving distance,D H ≡c/H(z) is the Hubble distance,D V is the volume-averaged (isotropic) BAO distance, andr s,drag is the comoving sound horizo

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Interacting Dark Sector field theory with phantom crossing

astro-ph.CO · 2026-05-19 · unverdicted · novelty 5.0

An interacting dark sector model with Yukawa-coupled fermionic DM and Born-Infeld tachyonic scalar produces recent double phantom crossing in effective w_DE, fits DESI+Planck+SN data, and predicts ultralight DM mass of order 1.9e-3 eV under naturalness assumptions.

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  • Interacting Dark Sector field theory with phantom crossing astro-ph.CO · 2026-05-19 · unverdicted · none · ref 28

    An interacting dark sector model with Yukawa-coupled fermionic DM and Born-Infeld tachyonic scalar produces recent double phantom crossing in effective w_DE, fits DESI+Planck+SN data, and predicts ultralight DM mass of order 1.9e-3 eV under naturalness assumptions.