On signatures of Planck-scale interactions in the cosmic microwave background radiation

Autor:	Friedemann Queisser, Ralf Schützhold, Michael Uhlmann
Rok vydání:	2007
Předmět:	Physics Theoretical physics Physics and Astronomy (miscellaneous) Physics beyond the Standard Model Cosmic microwave background Cosmic background radiation Quantum gravity Observable Lorentz covariance Effective action Quantum
Zdroj:	Classical and Quantum Gravity. 24:1375-1383
ISSN:	1361-6382 0264-9381
DOI:	10.1088/0264-9381/24/6/001
Popis:	Based on a rather general low-energy effective action (interacting quantum fields in classical curved spacetimes), we calculate potential signatures of new physics (e.g., quantum gravity) at ultra-high energies (such as the Planck scale) in the anisotropies of the cosmic microwave background radiation. Special emphasis is laid on the correct treatment of the initial state, which was not derived rigorously in previous works. These Planck-scale interactions create non-Gaussian contributions, and we focus on the three-point function as the most promising observable, which also allows discrimination between models violating and those obeying Lorentz invariance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::caca76faff52f91ed136146d83cd84c4 https://doi.org/10.1088/0264-9381/24/6/001 Zobrazit plný text záznamu