Astrophysical Consequences of a Neutrinophilic Two-Higgs-Doublet Model
Astrophysical Consequences of a Neutrinophilic Two-Higgs-Doublet Model
复制标题
中微子双希格斯双线模型的天体物理后果
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
C. Triola
中科院分区：
文献类型：
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作者：
M. Sher;C. Triola
在最近提出的亲中微子双Higgs模型中，低能（亚MeV）有效理论由一个vev为O（0.1）eV的真实的标量和三个Dirac中微子组成。其他模型也可能导致同样的低能理论。在这篇简报中，我们研究了模型参数空间的约束，包括真空稳定性、么正性、微扰性以及对不可见Z宽度的影响。有趣的是，我们发现所有的中微子在大约1000 K以上的温度下都变得无质量，但没有发现这一发现的现象学效应。对该模型最直接的检验是，它预测在银河系超新星中，电子、μ子和τ中微子的能量分布将是费米-狄拉克分布，具有相同的温度，而不是传统的分布。
In a recently proposed neutrinophilic two-Higgs doublet model, the low-energy (sub-MeV) effective theory consists of a real scalar with a vev of O(0.1) eV and three Dirac neutrinos. Other models could lead to the same low energy theory. In this Brief Report, we study constraints on the parameter space of the model, including vacuum stability, unitarity, perturbativity and the effects on the invisible Z width. Interestingly, we find that all neutrinos become massless at temperatures above approximately 1000 K, but can find no phenomenological effects of this finding. The most direct test of the model is that it predicts that in a galactic supernova, the energy distributions of the electron, muon and tau neutrinos will be Fermi-Dirac with identical temperatures, unlike the conventional distributions.