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Ultra-light Axions: Degeneracies with Massive Neutrinos and Forecasts for Future Cosmological Observations

Abstract:

A generic prediction of string theory is the existence of many axion fields. It has recently been argued that many of these fields should be light and, like the well known QCD axion, lead to observable cosmological consequences. In this paper we study in detail the effect of the so-called string axiverse on large scale structure, focusing on the morphology and evolution of density perturbations, anisotropies in the cosmic microwave background and weak gravitational lensing of distant galaxies...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevD.85.103514

Authors


Marsh, DJE More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Astrophysics
Trebitsch, M More by this author
Ferreira, PG More by this author
Journal:
Phys.Rev. D
Volume:
86
Issue:
10
Pages:
023508
Publication date:
2011-10-03
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
URN:
uuid:7b07cfaa-5638-49c8-8b5a-d6292ffb145c
Source identifiers:
208053
Local pid:
pubs:208053
Language:
English
Keywords:

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