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Evidence for X(3872)→J/ψπ+π− produced in single-tag two-photon interactions
Physical Review Letters. 2020. P. 1–17.
In press
We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the position in the final state, exploring the highly virtual photon region. The search is performed in e+e−→e+e−J/ψπ+π−, using 825 fb−1 of data collected by the Belle detector operated at the KEKB e+e− collider. We observe three X(3872) candidates with an expected background of 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for Γ~γγB(X(3872)→J/ψπ+π−) assuming the Q2 dependence predicted by a cc¯ meson model, where −Q2 is the invariant mass-squared of the virtual photon. No X(3915)→J/ψπ+π− candidates are found.
Publication based on the results of:
Ponomarev A., Aleksandrov N., Plasma Physics Reports 2026 Vol. 52 No. 3 P. 367–378
An approximate method for calculating drift velocity and other kinetic coefficients of heavy ions
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and ions, as well as rate constants for inelastic ion–molecule processes with these ions in helium with
small additions of O2 under an electric field. Calculated ...
Added: April 27, 2026
Domrin V. I., Malova H. V., V. Yu. Popov et al., Cosmic Research 2026 Vol. 64 No. 2 P. 238–252
During magnetospheric perturbations a relatively thin current sheet with thickness about several
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sheet thinning in the magnetotail, the processes of its formation are investigated depending on the normal
magnetic field magnitude which affects both the current sheet structure and particle dynamics within ...
Added: April 27, 2026
Tsareva O. O., Malova H. V., V. Yu. Popov et al., Plasma Physics Reports 2026 Vol. 52 No. 2 P. 179–185
The influence of asymmetry of plasma sources on the structure and spatial localization of a superthin
current sheet (STCS) supported by demagnetized electrons is studied using a self-consistent model. The
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Added: April 27, 2026
П.А.Беспалов, О.Н. Савина, Геомагнетизм и аэрономия 2025 Т. 65 № 5 С. 620–628
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theory based an the averaged self-consistent system of quasi-linear ...
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Bondarenko G.G., Fisher M. R., Kristya V. I., Bulletin of the Russian Academy of Sciences: Physics 2026 Vol. 90 No. 4 P. 572–576
A model of the cathode layer of a glow gas discharge with a thin dielectric film on a fraction of the
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drop, if the ...
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Zadkov V., Plasmonics 2026 Vol. 21 P. 1503–1512
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Shchur L., Antonov D., Burovski E., International Journal of Bifurcation and Chaos in Applied Sciences and Engineering 2026 P. 1–9
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Qin X., Deng Y., Shchur L. et al., / Series arXiv "math". 2026. No. 2603.02962.
We perform a Monte Carlo analysis of the Ising model on many three-dimensional lattices. By means of finite-size scaling we obtain the critical points and determine the scaling dimensions. As expected, the critical exponents agree with the three-dimensional Ising universality class for all models. The irrelevant field, as revealed by the correction-to-scaling amplitudes, appears to ...
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Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.
We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...
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Kalikin N., Брандышев П. Е., Budkov Y., Journal of Chemical Physics 2026 Vol. 164 Article 154904
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Moiseev E., Масютин Д. А., Мельниченко И. А. et al., Optics and Laser Technology 2025 Vol. 201 No. 115289 P. 1–5
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A. V. Pereskokov, Theoretical and Mathematical Physics 2026 Vol. 226 No. 3 P. 470–484
We consider the spectral problem for a hydrogen atom in orthogonal electric and magnetic fields with
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Khudyakova M., Gomozova M., Корженевская А. Ю. et al., В кн.: Миратив, нарратив, креатив: Сборник статей к юбилею Миры Бергельсон.: М.: Буки Веди, 2026. С. 174–183.
Fruit trees, cats, and other similar visual stimuli have demonstrated remarkable productivity in experimental research of the Center for Language and Brain, HSE University. Mira Bergelson played a key role in this pear-cat revolution: from introducing the "Pear Stories" film into clinical research to integrating cats into various tools for assessing language production and comprehension. These materials allowed ...
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Anna S. Bodrova, Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 2026 Vol. 113 No. 4 Article 045403
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Added: April 5, 2026
Рощин Д. Е., Патлажан С. А., Кравченко И. В. et al., Коллоидный журнал 2026 Т. 88 № 3
В работе экспериментально и методами численного моделирования исследованы особенности деформационной динамики вязкоупругих капель растворов полиакрилонитрила (ПАН) в диметилсульфоксиде (ДМСО) при течении в силиконовом масле в канале с резким сужением. Основное внимание сосредоточено на изучении влияния концентрации ПАН и капиллярного числа на деформационное поведение и устойчивость таких капель. Показано, что увеличение концентрации ПАН приводит к существенному ...
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Kalyabin D., Demidov V., Никитов С. А., Физика металлов и металловедение 2025 Т. 126 № 11 С. 1220–1225
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Чернышов Д. П., Satanin A., Shchur L., / Series arXiv "math". 2025.
We investigate the boundary separating regular and chaotic dynamics in the generalized Chirikov map, an extension of the standard map with phase-shifted secondary kicks. Lyapunov maps were computed across the parameter space (K,K(α, τ)) and used to train a convolutional neural network (ResNet18) for binary classification of dynamical regimes. The model reproduces the known critical ...
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Costley J., Anastasiia Kapuza, Gorbunova A. et al., Instructional Science 2025 Vol. 53 P. 1243–1262
Cognitive load theory describes the mechanisms for the transfer of information from human working memory to long-term memory. This theory posits that increasing the number of interactive elements, such as interconnections, may increase cognitive load. This study investigates the impact of interconnections in concept maps on cognitive load, exploring whether they act as interactive elements ...
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О чем не говорит размер эффекта: методология исследований формирования универсальных компетентностей
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The results of a systematic review of intervention research, that evaluates the effectiveness of practices for the formation of key competencies, are presented. The aim of the study is to identify characteristics of interventions conducted to evaluate the practices of forming critical and creative thinking, which can be used as distinguishing features in the design ...
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Ivanov D., Deviatko I. F., Мониторинг общественного мнения: Экономические и социальные перемены 2024 № 6 С. 27–51
Symbolic markers (as those used in “we-they” attributions) help delineate whether a scientist (among other things) finds themselves at the intersection, within, or outside the confines of a given disciplinary boundary, thereby facilitating the swift navigation across an ever-growing corpus of scientific literature. Frequently, these boundaries are revealed through bibliometric analysis, which makes it possible ...
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Katok E., Pavlov V., Journal of Operations Management 2013 Vol. 31 No. 3 P. 129–137
Various contracts can be designed to coordinate a simple supplier–retailer channel, yet the contracts proposed in prior research and tested in a laboratory setting do not perform as standard theory predicts. The supplier, endowed with all bargaining power, can neither fully coordinate the channel nor extract all of the channel profit. We report on a ...
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Kolmogorova A. V, Margolina A. V., Научный результат. Серия: Вопросы теоретической и прикладной лингвистики 2024 Vol. 10 No. 2 P. 71–99
In the context of the development of text generation technologies, the opposition “naturalness − unnaturalness of text” has been transformed into a new dichotomy: “naturalness – artificiality”. The aim of this article is to investigate the phenomenon of naturalness in this context from two perspectives: analyzing the linguistic characteristics of a natural text against a ...
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Kagan M., Silkin V. M., Efremov D. V., / Series arXiv "math". 2024. No. 2411.12836.
In this study, we analyze the dielectric function of high-Tc cuprates as a function of doping level, taking into account the full energy band dispersion within the CuO2 monolayer. In addition to the conventional two-dimensional (2D) gapless plasmon mode, our findings reveal the existence of three anomalous branches within the plasmon spectrum. Two of these branches ...
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Ali S., Ryzhikov A., Derkach D. et al., Moscow University Physics Bulletin 2024 Vol. 79 No. Suppl. 2 P. S591–S597
In the realm of high-energy physics, the longevity of calorimeters is paramount. Our research introduces a deep learning strategy to refine the calibration process of calorimeters used in particle physics experiments. We develop a Wasserstein GAN inspired methodology that adeptly calibrates the misalignment in calorimeter data due to aging or other factors. Leveraging the Wasserstein ...
Added: November 7, 2024