Axions, inflation and the anthropic principle
Axions, inflation and the anthropic principle
复制标题
轴子、暴胀和人择原理
DOI:
10.1088/1475-7516/2011/07/021
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发表时间:
2011
影响因子:
6.4
通讯作者:
Mack K
中科院分区:
文献类型:
--
作者:
Mack K
The QCD axion is the leading solution to the strong-CP problem, a dark matter candidate, and a possible result of string theory compactifications. However, for axions produced before inflation, symmetry-breaking scales of f a≳ 10 12 GeV (which are favored in string-theoretic axion models) are ruled out by cosmological constraints unless both the axion misalignment angle θ 0 and the inflationary Hubble scale H I are extremely fine-tuned. We show that attempting to accommodate a high-f a axion in inflationary cosmology leads to a fine-tuning problem that is worse than the strong-CP problem the axion was originally invented to solve. We also show that this problem remains unresolved by anthropic selection arguments commonly applied to the high-f a axion scenario.
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DOI:
10.1088/1126-6708/2008/06/056
发表时间:
2008
期刊:
arXiv: High Energy Physics - Theory
影响因子:
--
作者:
Keshav Dasgupta;H. Firouzjahi;R. Gwyn
通讯作者:
R. Gwyn
影响因子:
6.4
作者:
Ben Freivogel
通讯作者:
Ben Freivogel
影响因子:
6.4
作者:
Mack K
通讯作者:
Mack K
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
M. Hertzberg;M. Tegmark;F. Wilczek
通讯作者:
F. Wilczek
影响因子:
5.1
作者:
Kamat, JP;Devasagayam, TPA;Mittal, JP
通讯作者:
Mittal, JP