Primordial gravitational waves in non-minimally coupled chromo-natural inflation
We consider inflation driven by an axion-like particle coupled to an SU(2) gauge sector via a Chern-Simons term. Known as chromo-natural inflation, this scenario is in tension with CMB observations. In order to remedy this fact and preserve both the symmetries and the intriguing gravitational wave p...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/383149 |
| Acceso en línea: | http://hdl.handle.net/10261/383149 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186073548&doi=10.1088%2f1475-7516%2f2024%2f02%2f039&partnerID=40&md5=1e38bd8c4942c5b1204ce97d20e1d200 |
| Access Level: | acceso abierto |
| Palabra clave: | Cosmological perturbation theory Inflation Inflation and CMBR theory Primordial gravitational waves (theory) |
| Sumario: | We consider inflation driven by an axion-like particle coupled to an SU(2) gauge sector via a Chern-Simons term. Known as chromo-natural inflation, this scenario is in tension with CMB observations. In order to remedy this fact and preserve both the symmetries and the intriguing gravitational wave phenomenology exhibited by the model, we explore the non-minimal coupling of the axion-inflaton to the Einstein tensor. We identify regions of parameter space corresponding to a viable cosmology at CMB scales. We also highlight the possibility of a non-trivial chiral gravitational wave signal at small scales. © 2024 The Author(s) |
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