论文标题
中微子风味转换，对流和碰撞：迈向完整的解决方案
Neutrino Flavor Conversion, Advection, and Collisions: Towards the Full Solution
论文作者
论文摘要
在紧凑型天体物理源的高密度下，中微子的相干向前散射相互散射，负责使风味进化非线性。在球形对称性的假设下，我们提出了在存在中微子 - 中微子向前散射，具有物质背景的中性和带电的当前碰撞以及中微子对流的情况下跟踪风味转化的第一个模拟。我们发现，尽管风味平选物可能是解决方案之一，但这不是文献中经常假定的一般结果。有趣的是，风味转化，碰撞和对流之间的强烈相互作用导致风味转化率在中微子角分布和邻近的空间区域中传播。我们的模拟表明，缓慢而快速的风味转化可以同时发生。鉴于此，寻找电子中微子Lepton数量的交叉作为诊断工具的高密度制度中发生风味转化的诊断工具是一种有限的方法。
At high densities in compact astrophysical sources, the coherent forward scattering of neutrinos onto each other is responsible for making the flavor evolution non-linear. Under the assumption of spherical symmetry, we present the first simulations tracking flavor transformation in the presence of neutrino-neutrino forward scattering, neutral and charged current collisions with the matter background, as well as neutrino advection. We find that, although flavor equipartition could be one of the solutions, it is not a generic outcome, as often postulated in the literature. Intriguingly, the strong interplay between flavor conversion, collisions, and advection leads to a spread of flavor conversion across the neutrino angular distributions and neighboring spatial regions. Our simulations show that slow and fast flavor transformation can occur simultaneously. In the light of this, looking for crossings in the electron neutrino lepton number as a diagnostic tool of the occurrence of flavor transformation in the high-density regime is a limiting method.
