论文标题
碰撞引起的风味不稳定性，密集的中微子气体，依赖能量散射
Collision-induced flavor instability in dense neutrino gases with energy-dependent scattering
论文作者
论文摘要
我们研究了在两种味道混合的情况下与能量依赖性散射的均匀，各向同性，致密的中微子气体中碰撞引起的风味不稳定性。我们以风味 - 连续性碰撞率和中微子的电子Lepton数量分布来揭示这种不稳定性的生长速率的简单表达。这种生长速率对于不同能量的中微子和抗肿瘤是共同的，并且独立于中微子的质量分解和真空混合角，物质密度和中微子密度，尽管不稳定的振荡模式的初始振幅可以被大物质密度抑制。我们的结果表明，即使抑制了快速和缓慢的集体风味振荡，中微子可能会在核心爆发超新星内部碰撞引起的风味转化。
We investigate the collision-induced flavor instability in homogeneous, isotropic, dense neutrino gases in the two-flavor mixing scenario with energy-dependent scattering. We uncover a simple expression of the growth rate of this instability in terms of the flavor-decohering collision rates and the electron lepton number distribution of the neutrino. This growth rate is common to the neutrinos and antineutrinos of different energies, and is independent of the mass-splitting and vacuum mixing angle of the neutrino, the matter density, and the neutrino density, although the initial amplitude of the unstable oscillation mode can be suppressed by a large matter density. Our results suggest that neutrinos are likely to experience collision-induced flavor conversions deep inside a core-collapse supernova even when both the fast and slow collective flavor oscillations are suppressed.
