Non-Abelian gauge preheating
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2017
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| _version_ | 1866908493212024832 |
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| author | Adshead, Peter Giblin Jr, John T. Weiner, Zachary J. |
| author_facet | Adshead, Peter Giblin Jr, John T. Weiner, Zachary J. |
| contents | We study preheating in models where a scalar inflaton is directly coupled to a non-Abelian $SU(2)$ gauge field. In particular, we examine $m^2 ϕ^2$ inflation with a conformal, dilaton-like coupling to the non-Abelian sector. We describe a numerical scheme that combines lattice gauge theory with standard finite difference methods applied to the scalar field. We show that a significant tachyonic instability allows for efficient preheating, which is parametrically suppressed by increasing the non-Abelian self-coupling. Additionally, we comment on the technical implementation of the evolution scheme and setting initial conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1708_02944 |
| institution | arXiv |
| publishDate | 2017 |
| record_format | arxiv |
| spellingShingle | Non-Abelian gauge preheating Adshead, Peter Giblin Jr, John T. Weiner, Zachary J. High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory We study preheating in models where a scalar inflaton is directly coupled to a non-Abelian $SU(2)$ gauge field. In particular, we examine $m^2 ϕ^2$ inflation with a conformal, dilaton-like coupling to the non-Abelian sector. We describe a numerical scheme that combines lattice gauge theory with standard finite difference methods applied to the scalar field. We show that a significant tachyonic instability allows for efficient preheating, which is parametrically suppressed by increasing the non-Abelian self-coupling. Additionally, we comment on the technical implementation of the evolution scheme and setting initial conditions. |
| title | Non-Abelian gauge preheating |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory |
| url | https://arxiv.org/abs/1708.02944 |