A combined view of sterile-neutrino constraints from CMB and neutrino oscillation measurements
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- 作者：Sarah Bridle ; Jack Elvin-Poole ; jack.elvin-poole@postgrad.manchester.ac.uk ; Justin Evans ; Susana Fernandez ; Pawel Guzowski ; Stefan Sö ; ldner-Rembold
- 关键词：Sterile neutrinos ; Cosmology ; Oscillation experiments
- 刊名：Physics Letters B
- 出版年：2017
- 出版时间：10 January 2017
- 年：2017
- 卷：764
- 期：Complete
- 页码：322-327
- 全文大小：1386 K
- 卷排序：764
文摘
We perform a comparative analysis of constraints on sterile neutrinos from the Planck experiment and from current and future neutrino oscillation experiments (MINOS, IceCube, SBN). For the first time, we express joint constraints on NeffNeff and meffsterile from the CMB in the Δm2Δm2, sin22θsin22θ parameter space used by oscillation experiments. We also show constraints from oscillation experiments in the NeffNeff, meffsterile cosmology parameter space. In a model with a single sterile neutrino species and using standard assumptions, we find that the Planck 2015 data and the oscillation experiments measuring muon-neutrino (νμνμ) disappearance have similar sensitivity.