The bound state of dark atom with the nucleus of substance
National Research Nuclear University MEPhI（国立核研究大学莫斯科工程物理学院）；Institute of Physics, Southern Federal University（南联邦大学物理研究所）；Virtual Institute of Astroparticle physics（虚拟高能天体物理研究所）
T. E. Bikbaev, M. Yu. Khlopov, A. G. Mayorov
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Prepared for Proceedings of 28th Bled Workshop "What comes beyond the Standard models?"
The hypothesis of composite $XHe$ dark atoms offers a compelling framework to address the challenges in direct dark matter particles detection, as their neutral, atom-like configuration evades conventional experimental signatures. A critical issue may arise in interaction between $XHe$ and atomic nuclei due to the unshielded nuclear attraction, which could destabilize the dark atom's bound state. To resolve this, we propose a novel numerical quantum mechanical approach that accounts for self-consistent electromagnetic-nuclear couplings. This method addresses to eliminate the inherent complexity of the $XHe$-nucleus three-body system, where analytical solutions are intractable. By reconstructing the effective interaction potential - including dipole Coulomb barrier and shallow potential well - we demonstrate how these features lead to the formation of $XHe$-nucleus bound states and modulate low-energy capture processes. Our model enables validation of the dark atom hypothesis, particularly in interpreting experimental anomalies like annual modulation signals observed in DAMA/LIBRA. These findings advance the theoretical foundation for dark matter interactions and provide a robust framework for future experimental design.
Radiative emission of neutrino pair from nucleus and inner core electrons in heavy atoms
中微子对的辐射发射（RENP）是一种新的研究中微子最小质量、中微子质量性质（Majorana vs Dirac）及其CP性质等未知参数的实验工具。研究了中微子对从原子核或内核电子发射的效应，其中夸克或电子矢流的零分量引起大的耦合。给出了几种感兴趣的靶原子的光子能量的总体速率和光谱形状。计算出的速率超过了以前考虑的靶原子的许多数量级。
About possibility to search the electron EDM at the level $10^{-28} ÷10^{-30}$ e$\cdot$cm and the constant of T-odd, P-odd scalar weak interaction of an electron with a nucleus at the level $10^{-5} ÷10^{-7}$ in the heavy atoms and ferroelectrics
The eikonal approach to calculation of the multiphoton exchange contributions to the total cross sections of π^+pi^- atom interaction with ordinary atoms
