Weighing neutrinos in the presence of a running primordial spectral index

Weighing neutrinos in the presence of a running primordial spectral index
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在存在运行的原始光谱指数的情况下称量中微子

DOI:
10.1088/1475-7516/2006/12/011
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发表时间:
2006-05
影响因子:
6.4
通讯作者:
Zhang, Xinmin
Zhang, Xinmin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Xia, Jun-Qing;Yokoyama, Jun'ichi;Zhao, Gong-Bo;Feng, Bo;Zhang, Xinmin

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为期三年的威尔金森微波各向异性探测器观测,结合其他来自星系群集和Ia型超新星的宇宙学观测,支持独立于低宇宙微波背景多极的原始光谱指数的不消失运行。在这一特征的激励下,我们研究了中微子质量的宇宙学约束,这在很大程度上取决于我们对原始波动的光谱形状所采用的先验条件,并考虑到可能的运行。结果,我们发现对于三个中微子质量的总和,mν<0.76 eV (2σ),与mν<0.90 eV (2σ)相比,对于原始谱形状采用幂律先验的情况下,有更严格的约束。
The three-year Wilkinson Microwave Anisotropy Probe observations, combined with other cosmological observations from galaxy clustering and type Ia supernovae, favour a non-vanishing running of the primordial spectral index independent of the low cosmic microwave background multipoles. Motivated by this feature we study a cosmological constraint on the neutrino mass, which is strongly dependent on what prior we adopt for the spectral shape of primordial fluctuations, taking possible running into account. As a result we find a more stringent constraint on the sum of the three neutrino masses, mν<0.76 eV (2σ), compared with mν<0.90 eV (2σ) for the case where a power law prior is adopted for the primordial spectral shape.
DOI: 10.1088/1475-7516/2006/10/014
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影响因子: 6.4
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影响因子: 6.5
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期刊: Physical Review D
影响因子: 5
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