HYM-flation: Yang–Mills cosmology with Horndeski coupling

E. Davydov (Bogoliubov Laboratory of Theoretical Physics, JINR, Moscow region, Dubna, 141980, Russia) ; D. Gal'tsov (Faculty of Physics of the Moscow State University, Moscow, 119899, Russia)

We propose new mechanism for inflation using classical SU(2) Yang–Mills (YM) homogeneous and isotropic field non-minimally coupled to gravity via Horndeski prescription. This is the unique generally and gauge covariant ghost-free YM theory with the curvature-dependent action leading to second-order gravity and Yang–Mills field equations. We show that its solution space contains de Sitter boundary to which the trajectories are attracted for some finite time, ensuring the robust inflation with a graceful exit. The theory can be generalized to include the Higgs field leading to two-steps inflationary scenario, in which the Planck-scale YM-generated inflation naturally prepares the desired initial conditions for the GUT-scale Higgs inflation.

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      "title": "HYM-flation: Yang\u2013Mills cosmology with Horndeski coupling"
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      "value": "We propose new mechanism for inflation using classical SU(2) Yang\u2013Mills (YM) homogeneous and isotropic field non-minimally coupled to gravity via Horndeski prescription. This is the unique generally and gauge covariant ghost-free YM theory with the curvature-dependent action leading to second-order gravity and Yang\u2013Mills field equations. We show that its solution space contains de Sitter boundary to which the trajectories are attracted for some finite time, ensuring the robust inflation with a graceful exit. The theory can be generalized to include the Higgs field leading to two-steps inflationary scenario, in which the Planck-scale YM-generated inflation naturally prepares the desired initial conditions for the GUT-scale Higgs inflation."
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Published on:
30 December 2015
Publisher:
Elsevier
Published in:
Physics Letters B (2015)

DOI:
https://doi.org/10.1016/j.physletb.2015.12.070
Copyrights:
The Authors
Licence:
CC-BY-3.0

Fulltext files: