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arXiv 1909.09504hep-ph
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太阳中微子退相干的极限

Solar Neutrino Limits on Decoherence

Pedro Cunha de Holanda

摘要:

太阳中微子流作为质量本征态的非相干混合物到达地球,然后太阳中微子探测构成了对中微子味转换振荡模式的盲探测。因此,也不可能在模型独立的方法中探测任何导致中微子演化过程中退相干增强的新物理,这种效应存在于例如开放量子系统形式主义中。然而,这种机制也可以诱导质量本征态之间的变化,如果中微子子系统和水库之间的能量交换没有明确禁止。本文计算了开放量子系统中质量本征态之间的转换几率,并确定了这类跃迁的极限。我们以教学的方式呈现我们的结果,指出在进行完整计算之前,在没有对太阳内部中微子转换物理学进行任何假设的情况下,分析可以走多远。我们得到作为退相干参数的限制值的$ Γ_3< 6.5\times 10^{-19}$ eV和$Γ_8< 7.1\times 10^{-19}$ eV在3 $σ$。

英文摘要:

The solar neutrino flux arrives at Earth as an incoherent admixture of mass eigenstates, and then solar neutrino detection constitute a blind probe to the oscillation pattern of the neutrino flavour conversion. Consequently, it is also impossible to probe, in a model independent approach, any new physics that leads to an enhancement of decoherence during the neutrino evolution, an effect that is present for instance in Open Quantum System formalism. However, such mechanism can also induce changes between mass eigenstates if an energy interchange between the neutrino subsystem and the reservoir is not explicitly forbidden. In this work the conversion probabilities between mass eigenstates in an Open Quantum System are calculated, and limits are stablished for these kind of transitions. We present our results in a pedagogical way, pointing out how far the analysis can go without any assumption on the neutrino conversion physics inside the Sun, before performing the full calculations. We obtain as limits for the decoherence parameters the values of $ Γ_3< 6.5\times 10^{-19}$ eV and $Γ_8< 7.1\times 10^{-19}$ eV at 3$σ$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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