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The puzzles of direct dark matter searches can be solved in the scenario of dark atoms, which bind hypothetical, stable, lepton-like particles with charge $-2n$, where $n$ is any natural number, with $n$ nuclei of primordial helium. Avoid…

High Energy Physics - Phenomenology · Physics 2021-11-18 T. E. Bikbaev , M. Yu. Khlopov , A. G. Mayorov

The hypothesis of composite $XHe$ dark atoms may provide solution to the long-standing problem of direct searches for dark matter particles. The main problem of the $XHe$ dark atom is its ability to strongly interact with the nucleus of…

High Energy Physics - Phenomenology · Physics 2025-12-03 T. E. Bikbaev , M. Yu. Khlopov , A. G. Mayorov

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…

High Energy Physics - Phenomenology · Physics 2025-12-10 T. E. Bikbaev , M. Yu. Khlopov , A. G. Mayorov

The nonbaryonic dark matter of the Universe can consist of new stable charged particles, bound in heavy "atoms" by ordinary Coulomb interaction. If stable particles $O^{--}$ with charge -2 are in excess over their antiparticles (with charge…

High Energy Physics - Phenomenology · Physics 2011-11-16 Maxim Yu. Khlopov , Andrey G. Mayorov , Evgeny Yu. Soldatov

The nonbaryonic dark matter of the Universe is assumed to consist of new stable particles. A specific case is possible, when new stable particles bear ordinary electric charge and bind in heavy "atoms" by ordinary Coulomb interaction. Such…

Cosmology and Nongalactic Astrophysics · Physics 2010-11-23 Maxim Yu. Khlopov , Andrey G. Mayorov , Evgeny Yu. Soldatov

An ab-initio description of atomic nuclei that solves the nuclear many-body problem for realistic nuclear forces is expected to possess a high degree of predictive power. In this contribution we treat the main obstacle, namely the…

Nuclear Theory · Physics 2017-08-23 Hans Feldmeier , Thomas Neff , Robert Roth

Positive results of dark matter searches in experiments DAMA/NaI and DAMA/LIBRA taken together with negative results of other groups can imply nontrivial particle physics solutions for cosmological dark matter. Stable particles with charge…

Cosmology and Nongalactic Astrophysics · Physics 2009-12-01 Maxim Yu. Khlopov , Andrey G. Mayorov , Evgeniy Yu. Soldatov

The nonbaryonic dark matter of the Universe is assumed to consist of new stable particles. A specific case is possible, when new stable particles bear ordinary electric charge and bind in heavy "atoms" by ordinary Coulomb interaction. Such…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-17 Maxim Yu. Khlopov , Andrey G. Mayorov , Evgeny Yu. Soldatov

New stable quarks and charged leptons may exist and be hidden from detection, as they are bound by Coulomb interaction in neutral dark atoms of composite dark matter. This possibility leads to fundamentally new types of indirect effects…

High Energy Astrophysical Phenomena · Physics 2014-12-01 Jean-René Cudell , Maxim Yu. Khlopov , Quentin Wallemacq

Positive results of dark matter searches in DAMA/NaI and DAMA/LIBRA experiments, being put together with negative results of other groups, can imply nontrivial particle physics solutions for cosmological dark matter. Stable particles with…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Maxim Yu. Khlopov

Positive results of dark matter searches in experiments DAMA/NaI and DAMA/LIBRA confronted with results of other groups can imply nontrivial particle physics solutions for cosmological dark matter. Stable particles with charge -2, bound…

High Energy Physics - Phenomenology · Physics 2015-05-20 Maxim Yu. Khlopov , Andrey G. Mayorov , Evgeny Yu. Soldatov

We aim to describe the cluster states of nuclear systems starting with a realistic interaction, which is a challenge of modern nuclear theories. Here, the short-range correlation of realistic interaction is treated by employing the damping…

Nuclear Theory · Physics 2020-03-20 Naoyuki Itagaki , Tokuro Fukui , Akihiro Tohsaki

A recent composite-dark-matter scenario assumes that the dominant fraction of dark matter consists of O-helium (OHe) dark atoms, in which a lepton-like doubly charged particle O is bound with a primordial helium nucleus. It liberates the…

Cosmology and Nongalactic Astrophysics · Physics 2014-01-16 J. R. Cudell , M. Khlopov , Q. Wallemacq

Recently it was argued that it might be possible treat the conventional nuclear structure problem -- nonrelativistic point nucleons interacting through a static and rather singular potential -- as an effective theory in a shell-model basis.…

Nuclear Theory · Physics 2009-11-07 W. C. Haxton , T. Luu

We discuss recent theoretical developments in low-energy heavy-ion reactions. To this end, we put emphasis on a viewpoint of probing nuclear shapes with heavy-ion reactions. We first discuss a single-channel problem with an optical…

Nuclear Theory · Physics 2025-11-14 K. Hagino

Atomistic simulations based on the first-principles of quantum mechanics are reaching unprecedented length scales. This progress is due to the growth in computational power allied with the development of new methodologies that allow the…

Materials Science · Physics 2021-05-19 Mariana Rossi

The investigation of light nuclei with ab-initio methods provides an optimal setting to probe our knowledge on nuclear forces, because the few-nucleon problem can be solved accurately. Nucleons interact not only in pairs but also via…

Nuclear Theory · Physics 2011-04-07 Sonia Bacca

Direct searches for dark matter lead to serious problems for simple models with stable neutral Weakly Interacting Massive Particles (WIMPs) as candidates for dark matter. A possibility is discussed that new stable quarks and charged leptons…

Cosmology and Nongalactic Astrophysics · Physics 2011-12-06 Maxim Yu. Khlopov

We study neutron matter and symmetric nuclear matter with the quark-meson model for the two-nucleon interaction. The Bethe-Bruckner-Goldstone many-body theory is used to describe the correlations up to the three hole-line approximation with…

Nuclear Theory · Physics 2014-12-11 M. Baldo , K. Fukukawa

Among composite-dark-matter scenarios, one of the simplest and most predictive is that of O-helium (OHe) dark atoms, in which a lepton-like doubly charged particle O is bound with a primordial helium nucleus, and is the main constituent of…

High Energy Physics - Phenomenology · Physics 2016-11-18 Jean-René Cudell , Maxim Khlopov , Quentin Wallemacq
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