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- W4313304643 abstract "The Hubble constant inferred from the 6-parameter fit to the CMB power spectrum conflicts with the value obtained from direct measurements via type Ia supernova and Cepheids observations. We write down effective operators involving spin-0, spin-1/2, and spin-1 dark matter that lead to the relativistic production of dark matter particles at early times, and consequently lead to an increase in the number of relativistic degrees of freedom. This mechanism which is amenable to CMB, BBN, and structure formation observables can sufficiently raise the value of the Hubble constant derived from CMB and reconcile local and CMB probes of the Hubble constant. This mechanism alone increases $H_0$ up to $70, {rm km s^{-1} Mpc^{-1}}$, and with the help of a Phantom-like cosmology, reach $H_0 simeq 71-73, {rm km s^{-1} Mpc^{-1}}$. Lastly, we outline the region of parameter space which reproduces $H_0 simeq 71-73, {rm km s^{-1} Mpc^{-1}}$ while obeying all relevant constraints." @default.
- W4313304643 created "2023-01-06" @default.
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- W4313304643 date "2023-03-08" @default.
- W4313304643 modified "2023-10-11" @default.
- W4313304643 title "The hubble rate trouble: an effective field theory of dark matter" @default.
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- W4313304643 doi "https://doi.org/10.1140/epjc/s10052-023-11366-5" @default.
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