标题： 自旋中微子在带有薄磁化吸积盘的旋转黑洞引力散射 显示英文标题

标题： Gravitational scattering of spinning neutrinos by a rotating black hole with a slim magnetized accretion disk

摘要： 我们研究了中微子在旋转超大质量黑洞周围的引力散射现象，该黑洞被一个具有实际磁场的薄吸积盘所包围。 假设中微子是具有非零磁矩的狄拉克粒子。 中微子沿任意轨迹运动，入射流平行于赤道面。 我们精确地考虑了重力和磁场对中微子运动及其自旋演化的影响。 在准经典方法中，证明了在任意引力场中的粒子散射过程中，超相对论中微子的螺旋度在一般情况下是恒定的。 我们计算了可测量的出射中微子通量，考虑了弯曲时空中外场中中微子自旋进动的影响。 对于系统的某些参数，这些通量会显著受到抑制。 最后，我们讨论了在银河系中观测到核心坍缩超新星中微子预测现象的可能性。 显示英文摘要

摘要： We study neutrinos gravitationally scattered off a rotating supermassive black hole which is surrounded by a thin accretion disk with a realistic magnetic field. Neutrinos are supposed to be Dirac particles having a nonzero magnetic moment. Neutrinos move along arbitrary trajectories, with the incoming flux being parallel to the equatorial plane. We exactly account for the influence of both gravity and the magnetic field on the neutrino motion and its spin evolution. The general statement that the helicity of an ultrarelativistic neutrino is constant in the particle scattering in an arbitrary gravitational field is proven within the quasiclassical approach. We find the measurable fluxes of outgoing neutrinos taking into account the neutrino spin precession in the external field in curved spacetime. These fluxes turn out to be significantly suppressed for some parameters of the system. Finally, we discuss the possibility to observe the predicted phenomena for core-collapsing supernova neutrinos in our Galaxy.