arXiv 1012.53042010-12hep-ph

超新星中的质量变化中微子

Mass Varying Neutrinos in Supernovae

F. Rossi-Torres, M. M. Guzzo, P. C. de Holanda, O. L. G. Peres

备注：: 8 pages, 5 figures
发表信息：: Physical Review D84 053010 (2011)
DOI：: 10.1103/PhysRevD.84.053010

摘要：

本文研究了在超新星环境中采用变质量中微子（MaVaN）模型对中微子振荡参数空间、混合角（$\tan^2θ$）和真空质量差（$Δm^2_0$）的影响。我们考虑在双风味场景中电子至无菌通道$ν_e \rightarrow ν_s$和$\barν_e \rightarrow \barν_s$。在给定的MaVaN机制模型中，我们引入了一个位置相关的有效质量差，$Δ\tilde m^2(r)$，其中$r$是到超新星核心的距离，这改变了中微子和反中微子的味道转换概率。研究了r过程和SN1987A数据对混合角和真空质量差的约束。我们的结果是一个新的排斥区的外观非常小的混合角，$\tan^2θ=10^{-6}-10^{-2}$，和小真空质量差，$Δm^2_0=~1-20$ eV $^2$，由于MaVaN机制。

英文摘要：

We study the consequences on the neutrino oscillation parameter space, mixing angle ($\tan^2θ$) and vacuum mass difference ($Δm^2_0$), when mass varying neutrino (MaVaN) models are assumed in a supernova environment. We consider electronic to sterile channels $ν_e \rightarrow ν_s$ and $\barν_e \rightarrow \barν_s$ in two-flavor scenario. In a given model of MaVaN mechanism, we induce a position-dependent effective mass difference, $Δ\tilde m^2(r)$, where $r$ is the distance from the supernova core, that changes the neutrino and anti-neutrino flavour conversion probabilities. We study the constraints on the mixing angle and vacuum mass difference coming from r-process and the SN1987A data. Our result is the appearance of a new exclusion region for very small mixing angles, $\tan^2θ=10^{-6}-10^{-2}$, and small vacuum mass difference, $Δm^2_0=~1-20$ eV$^2$, due the MaVaN mechanism.

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