Dark sector equilibration during nucleosynthesis
نویسندگان
چکیده
منابع مشابه
Primordial Nucleosynthesis and Dark Matter
“At this point I would like to make a remark on the present state of observations relevant to cosmology. When a physicist reads a paper by a typical astronomer, he finds an unfamiliar style in the treatment of uncertainties and errors . . . The authors are apparently unwilling to state precisely the odds that their number is correct, although they have pointed out very carefully the many source...
متن کاملPrimordial Nucleosynthesis and Dark Matter
Following a brief introduction to early Universe cosmology, the current of status of big bang nucleosynthesis is reviewed and the concordance between theory and observation is examined in detail. The abundances of 4 He and 7 Li determine the value of the baryon-to-photon ratio, η to be relatively low, η ≈ 1.8 × 10 −10 , and agrees with some recent measurements of D/H in quasar absorption system...
متن کاملBig Bang Nucleosynthesis and Particle Dark Matter
We review how our current understanding of the light element synthesis during the Big Bang Nucleosynthesis era may help shed light on the identity of particle dark matter.
متن کاملMeV-mass dark matter and primordial nucleosynthesis
The annihilation of new dark matter candidates with masses mX in the MeV range may account for the galactic positrons that are required to explain the 511 keV γ-ray flux from the galactic bulge. We study the impact of MeV-mass thermal relic particles on the primordial synthesis of H, He, and Li. If the new particles are in thermal equilibrium with neutrinos during the nucleosynthesis epoch they...
متن کاملDark Matter and Big Bang Nucleosynthesis
The recently observed Deuterium abundance in a low-metallicity high-redshift hydrogen cloud, which is about ten times larger than that observed in the near interstellar medium, is that expected from the Standard Big Bang Nucleosynthesis theory and the observed abundances of He and Li extrapolated to their primordial values. The inferred cosmic baryon to photon ratio, η = (1.60±0.1)×10, yields a...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2019
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.100.015038