Abstract
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 annihilation channel. This requirement translates in an upper bound for the coupling of such a channel and makes the early structure formation viable.
Article PDF
Similar content being viewed by others
References
D.H. Lyth and E.D. Stewart, Thermal inflation and the moduli problem, Phys. Rev. D 53 (1996) 1784 [hep-ph/9510204] [INSPIRE].
G. Barenboim and J. Rasero, Electroweak baryogenesis window in non standard cosmologies, JHEP 07 (2012) 028 [arXiv:1202.6070] [INSPIRE].
G. Barenboim and O. Vives, About a (standard model) universe dominated by the right matter, Phys. Rev. D 79 (2009) 033007 [arXiv:0806.4389] [INSPIRE].
A.L. Erickcek and K. Sigurdson, Reheating Effects in the Matter Power Spectrum and Implications for Substructure, Phys. Rev. D 84 (2011) 083503 [arXiv:1106.0536] [INSPIRE].
R. Cen, Decaying cold dark matter model and small-scale power, Astrophys. J. 546 (2001) L77 [astro-ph/0005206] [INSPIRE].
E. Bertschinger, The Effects of Cold Dark Matter Decoupling and Pair Annihilation on Cosmological Perturbations, Phys. Rev. D 74 (2006) 063509 [astro-ph/0607319] [INSPIRE].
A. Boyarsky, J. Lesgourgues, O. Ruchayskiy and M. Viel, Lyman-α constraints on warm and on warm-plus-cold dark matter models, JCAP 05 (2009) 012 [arXiv:0812.0010] [INSPIRE].
P. Scott and S. Sivertsson, Gamma-Rays from Ultracompact Primordial Dark Matter Minihalos, Phys. Rev. Lett. 103 (2009) 211301 [Erratum ibid. 105 (2010) 119902] [arXiv:0908.4082] [INSPIRE].
B.C. Lacki and J.F. Beacom, Primordial Black Holes as Dark Matter: Almost All or Almost Nothing, Astrophys. J. 720 (2010) L67 [arXiv:1003.3466] [INSPIRE].
M. Ricotti and A. Gould, A New Probe of Dark Matter and High-Energy Universe Using Microlensing, Astrophys. J. 707 (2009) 979 [arXiv:0908.0735] [INSPIRE].
W.H. Press and P. Schechter, Formation of galaxies and clusters of galaxies by selfsimilar gravitational condensation, Astrophys. J. 187 (1974) 425 [INSPIRE].
Planck collaboration, P.A.R. Ade et al., Planck 2013 results. XXII. Constraints on inflation, arXiv:1303.5082 [INSPIRE].
J. Diemand, B. Moore and J. Stadel, Earth-mass dark-matter haloes as the first structures in the early Universe, Nature 433 (2005) 389 [astro-ph/0501589] [INSPIRE].
T. Goerdt, O.Y. Gnedin, B. Moore, J. Diemand and J. Stadel, The survival and disruption of CDM micro-haloes: Implications for direct and indirect detection experiments, Mon. Not. Roy. Astron. Soc. 375 (2007) 191 [astro-ph/0608495] [INSPIRE].
A. Schneider, L. Krauss and B. Moore, Impact of Dark Matter Microhalos on Signatures for Direct and Indirect Detection, Phys. Rev. D 82 (2010) 063525 [arXiv:1004.5432] [INSPIRE].
A.G. Cohen and D.B. Kaplan, Thermodynamic Generation of the Baryon Asymmetry, Phys. Lett. B 199 (1987) 251 [INSPIRE].
G. Barenboim and J.D. Lykken, Quintessence, inflation and baryogenesis from a single pseudo-Nambu-Goldstone boson, JHEP 10 (2007) 032 [arXiv:0707.3999] [INSPIRE].
G. Barenboim and J. Rasero, Baryogenesis from a right-handed neutrino condensate, JHEP 03 (2011) 097 [arXiv:1009.3024] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1311.4034
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Barenboim, G., Rasero, J. Structure formation during an early period of matter domination. J. High Energ. Phys. 2014, 138 (2014). https://doi.org/10.1007/JHEP04(2014)138
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP04(2014)138