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Future CMB experiments have the potential to probe the density of relativistic species at the sub-percent level.
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2015
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M. Bolz, A. Brandenburg, and W. Buchmüller, “Thermal Production of Gravitinos,” Nucl. Phys. B
2008
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J. Jaeckel and A. Ringwald, “The Low-Energy Frontier of Particle Physics,” Ann. Rev. Nucl. Part. Sci
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W. Fischler and J. Meyers, “Dark Radiation Emerging After Big Bang Nucleosynthesis?,” Phys. Rev. D
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2015
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2015
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R. Foot and S. Vagnozzi, “Dissipative Hidden Sector Dark Matter,” Phys. Rev. D
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2015
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Cambridge University Press, Cambridge, UK, 2015
D. Baumann and L. McAllister, Inflation and String Theory · 2015
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2015
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2015
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2015
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2015
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2016
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D. Baumann, D. Green, J. Meyers, and B. Wallisch, “Phases of New Physics in the CMB,” JCAP
2016
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D. Marsh, “Axion Cosmology,” Phys. Rep
2016
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M. Reece and T. Roxlo, “Nonthermal Production of Dark Radiation and Dark Matter,” JHEP
2016
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P. Adshead, Y. Cui, and J. Shelton, “Chilly Dark Sectors and Asymmetric Reheating,” JHEP
2016
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2016
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