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Structure Formation during an early period of matter domination · Around

2013

Structure Formation during an early period of matter domination

Barenboim, Gabriela, Rasero, Javier

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In this work we show that modifying the thermal history of the Universe by including an early period of matter domination can lead to the formation of astronomical objects.

However, the survival of these objects can only be possible if the dominating matter decays to a daughter particle which is not only almost degenerate with the parent particle but also has an open coannihilation channel.
This requirement translates in an upper bound for the coupling of such a channel and makes the early structure formation viable.

Built on

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R. Cen, “Decaying cold dark matter model and small-scale power,” Astrophys. J. 546
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E. Bertschinger, “The Effects of Cold Dark Matter Decoupling and Pair Annihilation on Cosmological Perturbations,” Phys. Rev. D 74
2006
Earlier work this paper cites.
G. Barenboim and O. Vives, “About a (standard model) universe dominated by the right matter,” Phys. Rev. D 79
Original
2009
Earlier work this paper cites.

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Then

A. L. Erickcek and K. Sigurdson, “Reheating Effects in the Matter Power Spectrum and Implications for Substructure,” Phys. Rev. D 84
Original
2011
Later among the works it cites.
A. G. Cohen and D. B. Kaplan, ‘THERMODYNAMIC GENERATION OF THE BARYON ASYMMETRY,” Phys. Lett. B 199
Original
2011
Later among the works it cites.
G. Barenboim and J. Rasero, “Electroweak baryogenesis window in non standard cosmologies,” JHEP 1207
Original
2012
Later among the works it cites.
P. A. R. Ade et al
Original
2013
Closest in time.

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