Kivokurtseva P. «Axion-Neutrino Interactions in Seesaw Models and Astrophysical Probes» Журнал экспериментальной и теоретической физики, 170, № 2, с. 107-112 (2026)

We study axion-neutrino interactions in neutrino-mass extensions of the Standard Model, focusing on the Type-I and inverse seesaw. In benchmark scenarios where the effective ALP charge of the light neutrino is comparable to the electron coefficient, the coupling g_{a u} can be related to the axion scale and constrained using existing limits on axion couplings to electrons. We then estimate the impact of axion-mediated scattering on neutrino propagation in two benchmarks: resonant interactions with the C u B and scattering on axion dark matter. In the parameter space allowed by current bounds, the resulting optical depths are extremely small, implying no observable signatures with present sensitivities. Keywords: axion , neutrino , astrophysics

Теленков М.П., Митягин Ю.А. «Процессы рассеяния электронов на акустических фононах в квантовых ямах в наклонном квантующем магнитном поле» Журнал экспериментальной и теоретической физики, 170, № 2, с. 139-153 (2026)

Рассмотрены процессы рассеяния электронов на продольных акустических фононах в квантующем магнитном поле. Получены выражения для скорости рассеяния в магнитном поле, наклоненном к слоям квантовой ямы. Посредством анализа этих выражений установлены тенденции поведения скорости рассеяния при изменении величины и ориентации магнитного поля, а также потенциального профиля квантовой ямы. Ключевые слова: квантовые ямы, уровни Ландау, рассеяние на акустических фононах, наклонное магнитное поле

Ji-Hoon Ha, Volnova E.S. «Flow-Regulated Suprathermal Particle Acceleration in Weakly Collisional Astrophysical Plasmas» Журнал экспериментальной и теоретической физики, 170, № 2, с. 154-164 (2026)

We investigate the formation of suprathermal particle populations in weakly collisional plasmas using a one-dimensional Fokker–Planck framework. A key element of this work is the introduction of a systematic velocity-space drift term that represents net energization relative to a background streaming flow. This term provides a minimal phenomenological description of competing relaxation and acceleration processes, enabling the incorporation of large-scale plasma dynamics into kinetic particle evolution. The model further includes spatial advection, velocity-space diffusion associated with wave-particle interactions, and collisional relaxation. To explore the role of time-dependent large-scale plasma dynamics, we consider three representative temporal profiles of the streaming velocity: accelerating, decelerating, and steady flows. We find that velocity-space diffusion primarily governs the formation of suprathermal tails, while the streaming-induced drift regulates their efficiency and spectral properties. In particular, the overall fraction of suprathermal particles depends only weakly on the detailed temporal evolution of the flow and is largely controlled by the time-averaged streaming velocity. These results suggest that large-scale streaming motions can be incorporated as an effective systematic energization mechanism in weakly collisional plasmas, providing a minimal and flexible framework applicable to a broad range of space and astrophysical environments. Keywords: suprathermal particles, particle acceleration,weakly collisional plasma, wave particle interactions, streaming flow