Agafonova N., Ashikhmin V., Dobrynina E., Enikeev R., Ryazhskaya O., Shakyrianova I., Yakushev V. «Search for neutrino radiation from the collapse of stellar cores using LVD detector» Вестник Московского университета. Серия 3: Физика. Астрономия, № 2, http://vmu.phys.msu.ru/toc/2022/2 (2022)

The article presents the latest results with the experiment of the Large Volume Detector located in the Gran Sasso Laboratory at the depth of 3650 m.w.e. LVD has been in operation since 1992 on the program a search for neutrino bursts from stellar core colapses, variations of the cosmic ray muon flux, and investigations of background sources at detecting rare events. According to the data of the LVD neutrino telescope for 29 years of operation (1992–2021), an experimental limitation on the frequency of neutrino bursts from gravitational collapses of stars in the Galaxy was obtained: less than 1 event in 12.6 years (f=0.08 year^–1) at a 90% confidence level.

Alemanno F. «The DAMPE space mission: status and main results» Вестник Московского университета. Серия 3: Физика. Астрономия, № 2, http://vmu.phys.msu.ru/toc/2022/2 (2022)

The DArk Matter Particle Explorer (DAMPE) is a satellite orbiting at 500 km altitude in a Sun-synchronous orbit, taking data from its launch on December 17th, 2015. DAMPE is composed by several particle detectors, working together to identify incoming particles and nuclei. Main goals of the DAMPE space mission are: study of cosmic-rays and electron-positron energy spectra, gamma-ray astronomy, and indirect dark matter search. The main results achieved by DAMPE will be presented in this work.

Alexandrov A. «Directional Dark Matter Search with NEWSdm» Вестник Московского университета. Серия 3: Физика. Астрономия, № 2, http://vmu.phys.msu.ru/toc/2022/2 (2022)

Despite significant searches for dark matter, experiments have so far produced no results. The latest generation of nuclear emulsions, Nano Imaging Trackers (NIT), has nanometric precision and was created specifically for a directional DM search. The NIT emulsion is used as both the Weakly Interactive Massive Particle (WIMP) target and the nanometric-accuracy tracking device in the Nuclear Emulsion WIMP Search with Directional Measurement (NEWSdm) experiment, which is housed in the Gran Sasso underground laboratory in Italy. Detector design, the super-resolution readout technology, expected backgrounds, physics potential, and near-future plans are all discussed here.

Arbuzova E. «New Options for SUSY-kind Dark Matter» Вестник Московского университета. Серия 3: Физика. Астрономия, № 2, http://vmu.phys.msu.ru/toc/2022/2 (2022)

In the conventional cosmology masses of the stable supersymmetric relics, candidates for the dark matter (DM) particles, should be typically below 1 TeV. This is in conflict with the LHC bounds on the low energy SUSY. However, in R2-gravity the masses of the stable particles with the interaction strength typical for SUSY could be much higher depending upon the dominant decay mode of the scalaron. We discuss the bounds on the masses of DM particles for the following dominant decay modes: to minimally coupled massless scalars, to massive fermions, and to gauge bosons.

Agafonova N., Ashikhmin V., Dobrynina E., Enikeev R., Ryazhskaya O., Shakyrianova I., Yakushev V. «Search for neutrino radiation from the collapse of stellar cores using LVD detector» Вестник Московского университета. Серия 3: Физика. Астрономия, № 2, http://vmu.phys.msu.ru/toc/2022/2 (2022)

The article presents the latest results with the experiment of the Large Volume Detector located in the Gran Sasso Laboratory at the depth of 3650 m.w.e. LVD has been in operation since 1992 on the program a search for neutrino bursts from stellar core colapses, variations of the cosmic ray muon flux, and investigations of background sources at detecting rare events. According to the data of the LVD neutrino telescope for 29 years of operation (1992–2021), an experimental limitation on the frequency of neutrino bursts from gravitational collapses of stars in the Galaxy was obtained: less than 1 event in 12.6 years (f=0.08 year^–1) at a 90% confidence level.

Babajanov B.A., Azamatov A.Sh. «Integration of the Kaup–Boussinesq system with a self-consistent source via inverse scattering method» Вестник Удмуртского университета: Математика. Механика. Компьютерные науки, 22, № 2, с. 153-170 (2022)

Рассматривается система Каупа–Буссинеска с самосогласованным источником. Показано, что система Каупа–Буссинеска с самосогласованным источником может быть проинтегрирована методом обратной задачи рассеяния. Для решения рассматриваемой задачи используются прямая и обратная задачи рассеяния уравнения Штурма–Лиувилля с потенциалом, зависящим от энергии. Определена временная эволюция данных рассеяния для уравнения Штурма–Лиувилля с энергозависимыми потенциалами, связанными с решением системы Каупа–Буссинеска с самосогласованным источником. Полученные равенства полностью определяют данные рассеяния при любом t, что позволяет применить метод обратной задачи рассеяния для решения задачи Коши для системы Каупа–Буссинеска с самосогласованным источником. Ключевые слова: нелинейное уравнение солитона, система Каупа–Буссинеска, самосогласованный источник, метод обратного рассеяния, квадратичный пучок уравнений Штурма–Лиувилля.