Non-Gaussianity from resonant curvaton decay
Non-Gaussianity from resonant curvaton decay
复制标题
共振曲率衰减导致的非高斯性
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
A. Rajantie
中科院分区:
文献类型:
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作者:
A. Chambers;Sami Nurmi;A. Rajantie
We calculate curvature perturbations in the scenario in which the curvaton field decays into another scalar field via parametric resonance. As a result of a nonlinear stage at the end of the resonance, standard perturbative calculation techniques fail in this case. Instead, we use lattice field theory simulations and the separate universe approximation to calculate the curvature perturbation as a nonlinear function of the curvaton field. For the parameters tested, the generated perturbations are highly non-Gaussian and not well approximated by the usual fNL parameterisation. Resonant decay plays an important role in the curvaton scenario and can have a substantial effect on the resulting perturbations.
影响因子:
5
作者:
Assadullahi H
通讯作者:
Assadullahi H
影响因子:
8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者:
Wright, E. L.
影响因子:
5
作者:
F. Arroja;S. Mizuno;K. Koyama;Takahiro Tanaka
通讯作者:
F. Arroja;S. Mizuno;K. Koyama;Takahiro Tanaka