Spectrum of the axion dark sector
Spectrum of the axion dark sector
复制标题
轴子暗区的光谱
DOI:
10.1103/physrevd.96.083510
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发表时间:
2017
影响因子:
5
通讯作者:
Stott M
中科院分区:
文献类型:
--
作者:
Stott M
Axions arise in many theoretical extensions of the Standard Model of particle physics, in particular the “string axiverse.” If the axion masses,, and (effective) decay constants,, lie in specific ranges, then axions contribute to the cosmological dark matter and dark energy densities. We compute the background cosmological (quasi)observables for models with a large number of axion fields,, with the masses and decay constants drawn from statistical distributions. This reduces the number of parameters fromto a small number of “hyperparameters.” We consider a number of distributions, from those motivated purely by statistical considerations to those where the structure is specified according to a class of M-theory models. Using Bayesian methods, we are able to constrain the hyperparameters of the distributions. In some cases, the hyperparameters can be related to string theory, e.g., constraining the number ratio of axions to moduli, or the typical decay constant scale needed to provide the correct relic densities. Our methodology incorporates the use of both random matrix theory and Bayesian networks.
DOI:
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发表时间:
2006
期刊:
--
影响因子:
--
作者:
Iroon Polytechniou-
通讯作者:
Iroon Polytechniou-
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Dong Wang
通讯作者:
Dong Wang