HYM-flation: Yang-Mills cosmology with Horndeski coupling
| Autor: | Davydov, E., Gal'tsov, D. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Physics Letters B (2016) pp. 622-628 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.physletb.2015.12.070 |
| Popis: | 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. Comment: 13 pages, 3 figures |
| Databáze: | arXiv |
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