论文标题
中微子解耦被风味转化改变
Neutrino Decoupling Is Altered by Flavor Conversion
论文作者
论文摘要
由于中微子的相干向前散射，核心偏曲超新星和紧凑型二元合并残留物的深层内中微子密度使中微子风味进化不线。在球形对称性的假设下，我们在理想化的设置中与物质解耦，并在存在带电的电流和中性电流碰撞以及中微子对流的情况下呈现出风味演化的第一个非线性模拟。在我们的框架内，我们发现风味转化发生在中微子与物质完全解散之前，会动态影响所有中微子物种的风味分布并移动中微子去耦表面的位置。我们的结果要求进一步工作，因为它们可能对超新星的爆炸机制有影响，重元素的核合成以及可观察到的中微子信号，所有这些信号尚未评估。
The large neutrino density in the deep interior of core-collapse supernovae and compact binary merger remnants makes neutrino flavor evolution non-linear because of the coherent forward scattering of neutrinos among themselves. Under the assumption of spherical symmetry, we model neutrino decoupling from matter in an idealized setup and present the first non-linear simulation of flavor evolution in the presence of charged current and neutral current collisions, as well as neutrino advection. Within our framework, we find that flavor transformation occurs before neutrinos fully decouple from matter, dynamically affecting the flavor distributions of all neutrino species and shifting the location of the neutrino decoupling surfaces. Our results call for further work as they may have implications on the explosion mechanism of supernovae, the nucleosynthesis of the heavy elements, as well as the observable neutrino signal, all of which is yet to be assessed.
