论文标题
在密集的中微子媒体上分发神话：快速成对转换取决于能量
Dispelling a myth on dense neutrino media: fast pairwise conversions depend on energy
论文作者
论文摘要
中微子的成对转化使量化中微子微物理学在紧凑型天体物理对象中相关性的挑战性目标变得复杂，限制了执行数值模拟的能力并鼓励使用半分析工具（例如线性稳定性分析）。考虑到高中微子密度，成对转化对中微子能量的依赖性被认为起着可以忽略的作用。我们表明，快速成对转化受到中微子能量的影响，尤其是在非线性方案中。随着真空频率的增加（即中微子能量降低），发现了较早的风味转化率和更高的振荡频率；随着真空频率的增加，振荡周期性（否则）会逐渐破坏。但是，与“缓慢”中微子 - 中微子中微子中微子的转化相反，这种影响并没有进一步加剧中微子的光谱能量分布。此外，我们的发现突出了快速成对转换对中微子真空频率实际值的中微子质量顺序的依赖性。我们的发现突出了基于快速转换的线性态度广泛采用的近似和外推的固有的局限性。为了衡量它们对源物理的可能影响，需要对成对转换进行更复杂的建模。
Pairwise conversions of neutrinos have complicated the challenging goal of quantifying the relevance of neutrino microphysics in compact astrophysical objects, limiting the ability to perform numerical simulations and encouraging the employment of semi-analytical tools, such as the linear stability analysis. Given the high neutrino density, the dependence of pairwise conversions on the neutrino energy has been deemed to play a negligible role. We show that fast pairwise conversions are affected by the neutrino energy, especially in the non-linear regime. An earlier onset of flavor conversions and a higher oscillation frequency are found as the vacuum frequency increases (i.e., the neutrino energy decreases); the oscillation periodicity, otherwise present, is gradually destroyed as the vacuum frequency increases. Such effects are, however, not further exacerbated by the inclusion of spectral energy distributions for neutrinos, contrary to what was found for "slow" neutrino-neutrino conversions. In addition, our findings highlight the dependence of fast pairwise conversions on the neutrino mass ordering for realistic values of the neutrino vacuum frequency. Our findings highlight the limitations intrinsic to widely adopted approximations and extrapolations based on the linear regime of fast conversions. In order to gauge their possible impact on the source physics, a more sophisticated modeling of pairwise conversions is necessary.
