Local Observables in a Landscape of Infrared Gauge Modes

Autor:	Thorsrud, Mikjel, Mota, David F., Urban, Federico R.
Rok vydání:	2013
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory
Zdroj:	Physics Letters B 733C (2014), pp. 140-143
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physletb.2014.04.028
Popis:	Cosmological local observables are at best statistically determined by the fundamental theory describing inflation. When the scalar inflaton is coupled uniformly to a collection of subdominant massless gauge vectors, rotational invariance is obeyed locally. However, the statistical isotropy of fluctuations is spontaneously broken by gauge modes whose wavelength exceed our causal horizon. This leads to a landscape picture where primordial correlators depend on the position of the observer. We compute the stochastic corrections to the curvature power spectrum, show the existence of a new local observable (the shape of the quadrupole), and constrain the theory using Planck limits. Comment: 5 pages, 3 figures, v2: minor updates, matches version published in Physics Letters B
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1311.3302 Zobrazit plný text záznamu View this record from Arxiv