The Supercooled Universe. (arXiv:1812.06996v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Baratella_P/0/1/0/all/0/1">Pietro Baratella</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Pomarol_A/0/1/0/all/0/1">Alex Pomarol</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Rompineve_F/0/1/0/all/0/1">Fabrizio Rompineve</a>
Strongly-coupled theories at the TeV can naturally drive a long period of
supercooling in the early universe. Trapped into the deconfined phase, the
universe could inflate and cool down till the temperature reaches the QCD
strong scale. We show how at these low temperatures QCD effects are important
and could trigger the exit from the long supercooling era. We also study the
implications on relic abundances. In particular, the latent heat released at
the end of supercooling could be the reason for the similarities between dark
matter and baryon energy densities. The axion abundance could also be
significantly affected, allowing for larger values of the axion decay constant.
Finally, we discuss how a long supercooling epoch could lead to an enhanced
gravitational wave signal.
Strongly-coupled theories at the TeV can naturally drive a long period of
supercooling in the early universe. Trapped into the deconfined phase, the
universe could inflate and cool down till the temperature reaches the QCD
strong scale. We show how at these low temperatures QCD effects are important
and could trigger the exit from the long supercooling era. We also study the
implications on relic abundances. In particular, the latent heat released at
the end of supercooling could be the reason for the similarities between dark
matter and baryon energy densities. The axion abundance could also be
significantly affected, allowing for larger values of the axion decay constant.
Finally, we discuss how a long supercooling epoch could lead to an enhanced
gravitational wave signal.
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