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arXiv 1909.06320hep-phastro-ph.COastro-ph.HE
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核塌缩超新星中keV不育中微子的共振产生和轻子数扩散

Resonance production of keV sterile neutrinos in core-collapse supernovae and lepton number diffusion

Vsevolod Syvolap, Oleg Ruchayskiy, Alexey Boyarsky

摘要:

我们研究如何假设的粒子-不育中微子-可以通过$\barν_μ$和$\bar ν_τ$的共振转换在爆炸的超新星内部产生。我们处理的新颖之处在于适当考虑轻子数扩散。我们计算了无菌中微子的产率,发现即使考虑到反反应,无菌中微子可以进行相当大的一部分爆炸的总能量相比,活性中微子。然而,生产对内部超新星区域的温度呈指数敏感,这使得具有挑战性的预测变得强大。为了了解这种产生是否会影响超新星的演化并因此受到限制,需要进行详细的模拟,包括无菌中微子的影响。

英文摘要:

We investigate how hypothetical particles - sterile neutrinos - can be produced in the interior of exploding supernovae via the resonant conversion of $\barν_μ$ and $\bar ν_τ$. The novelty of our treatment lies in the proper account of the resulting lepton number diffusion. We compute the yield of sterile neutrinos and find that even after taking into account back reaction, sterile neutrinos can carry out a sizeable fraction of the total energy of the explosion comparable to that of active neutrinos. The production is, however, exponentially sensitive to the temperature in the inner supernovae regions, making robust predictions of challenging. In order to understand whether this production affects supernova evolution and can therefore be constrained, detailed simulations including the effects of sterile neutrinos are needed.

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