A5014824013- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Relativity and Gravitational Theory
- High-Energy Particle Collisions Research
- Gamma-ray bursts and supernovae
- Computational Physics and Python Applications
- Statistical and numerical algorithms
- Scientific Research and Philosophical Inquiry
- Particle accelerators and beam dynamics
- Food Industry and Aquatic Biology
- Matrix Theory and Algorithms
- Synthesis and Reactions of Organic Compounds
- Advanced NMR Techniques and Applications
- Radiation Therapy and Dosimetry
- Crystallography and Radiation Phenomena
- Neutrino Physics Research
- Particle Detector Development and Performance
- Scientific Research and Discoveries
- Quantum and Classical Electrodynamics
- Geophysics and Gravity Measurements
Laboratoire AstroParticule et Cosmologie
2023-2024
Southern Federal University
2013-2023
Moscow Institute of Physics and Technology
2019
Joint Institute for Nuclear Research
2018-2019
Lund University
2013
Institute of Physics
2002
Since the science white paper of Large High Altitude Air Shower Observatory (LHAASO) published on arXiv in 2019 [e-Print: 1905.02773 (astro-ph.HE)], LHAASO has completed transition from a project to an operational gamma-ray astronomical observatory is new generation multi-component facility located Daocheng, Sichuan province China, at altitude 4410 meters. It aims measuring with unprecedented sensitivity spectrum, composition, and anisotropy cosmic rays energy range between 10$^{12}$...
Adopting the hypothesis about exact cancellation of vacuum condensates contributions to ground state energy in particle physics leading order graviton-mediated interactions, we argue that observable cosmological constant can be dynamically induced by an uncompensated quantum gravity correction them after QCD phase transition epoch. To start with, demonstrate a possible quark-gluon condensate contribution total density Universe at temperatures $T<100$ MeV without taking into account effects....
The problems of simple elementary weakly interacting massive particles (WIMPs) appeal to extend the physical basis for nonbaryonic dark matter. Such extension involves more sophisticated matter candidates from physics beyond Standard Model (BSM) particles. We discuss several models matter, predicting new colored, hyper-colored or techni-colored and their accelerator non-accelerator probes. nontrivial properties proposed can shed light on physics. They provide interesting solutions puzzles...
Most of the traditional technicolor-based models are known to be in a strong tension with electroweak precision tests. We show that this serious issue is naturally cured strongly coupled sectors chiral-symmetric vectorlike gauge interactions framework gauged linear $\ensuremath{\sigma}$ model. discuss possible phenomenological implications such nonstandard technicolor scenario its simplest formulation preserving standard model (SM) Higgs mechanism. For purpose, we assume existence an extra...
The lack of positive evidence for Weakly Interacting Massive Particles (WIMPs) as well the discovery supersymmetric (SUSY) particles at LHC may appeal to a non-supersymmetric solution Standard Model problem Higgs boson mass divergence, origin electroweak energy scale and physical nature cosmological dark matter in approach composite boson. If consists charged constituents, their binding can lead stable with charges. Such take part sphaleron transitions early Universe, which balance excess...
We suggest one of the possible ways to compensate large negative quantum-topological QCD contribution vacuum energy density Universe by means a positive constant from cosmological Yang-Mills field. An important role exact particular solution for field corresponding finite-time instantons is discussed. interesting connection compensation mechanism color confinement in framework instanton models has been pointed out. Besides ${\ensuremath{\Lambda}}_{\mathrm{QCD}}$ scale, this proposal relies...
The history of dark universe physics can be traced from processes in the very early to modern dominance matter and energy. Here, we review possible nontrivial role strong interactions cosmological effects new physics. In case ordinary QCD interaction, existence stable colored particles such as quarks leads exotic forms matter, some which candidates for matter. New QCD-like lead composite bound by confinement. We put special emphasis on interaction between hadrons formation anomalous cosmic...
A toy-model with $SU(2)_{\rm TC}$ dynamics confined at high scales $\Lambda_{\rm TC}\gg 100$ GeV enables to construct Dirac UV completion from the original chiral multiplets predicting a vector-like nature of their weak interactions consistent electroweak precision tests. In this work, we investigate potential lightest scalar baryon-like (T-baryon) state $B^0=UD$ mass $m_B\gtrsim 1$ TeV predicted by simplest two-flavor confinement model as Dark Matter (DM) candidate. We show that two...
One of the specific predictions a new strongly coupled dynamics at TeV scale is existence stable vector-like technibaryon states so that lightest neutral one could serve as Dark Matter candidate. We study latter hypothesis in QCD-type technicolor with $$\mathrm{SU}(3)_\mathrm{TC}$$ confined group and $$\mathrm{SU}(2)_\mathrm{W}$$ doublet techniquarks consistent electroweak precision constraints test it against existing astrophysics data. discuss most stringent on weak interactions...
Vectorlike interaction of additional heavy fermions with the standard bosons is constructed explicitly for two-color case. Mass splitting in a set scalar baryons has been analyzed and it turns out that small. Relic abundance Dark Matter calculated on assumption lightest neutral baryon carrier. The model predicts strong relation between masses pseudo-Goldstone states conformal limit.
We consider main properties of hadronic Dark Matter (DM) candidate consisting new heavy stable quark and the light ordinary one. This additional arises in chiral-symmetric extension Standard Model has standard electromagnetic strong interactions. Neutral charged pseudoscalar low-lying states are interpreted as DM carrier its nearest partner. Their masses lifetime state evaluated; we also describe asymptotics low-energy potential particles interactions with nucleons each other. Annihilation...
We analyze an extension of the Standard Model with additional SU(2) hypercolor gauge group keeping Higgs boson as a fundamental field. Vectorlike interactions new hyperquarks intermediate vector bosons are explicitly constructed. also consider pseudo-Nambu--Goldstone caused by symmetry breaking SU(4)-> Sp(4). A specific global model zero hypercharge hyperquark doublets ensures stability neutral pseudoscalar Some possible manifestations lightest states at colliders examined.
Abstract In order to reveal the nature of dark matter, it is crucial detect its non-gravitational interactions with standard model particles. The traditional matter searches focused on so-called weakly interacting massive However, this paradigm strongly constrained by null results current experiments high precision. Therefore there a renewed interest for heavy particles above TeV scale. Large High Altitude Air Shower Observatory (LHAASO) large effective area and strong background rejection...
High-energy cosmic ray electrons interaction with Dark Matter particles are considered. In particular, a weakening of energy spectrum is predicted resulting from inelastic electron scattering on hyper-pions in the hypercolor extension Standard Model. Corresponding cross section and angular distributions secondary neutrino calculated studied. We also briefly discuss some effects processes such type.
The new stable fermion family, with Standard Model electroweak (EW) charges, should take part in sphaleron transitions the early Universe before breaking of EW symmetry. conditions balance between excess fermions (additional generation superheavy U, D quarks and E, N leptons) baryon asymmetry, were considered at temperatures above, below, phase transition, using a system equations for chemical potentials.
Stable multiple charged particles can possess electroweak charges, as per the walking technicolor models. An asymmetry of these is balanced by sphaleron transitions which among other things provide an excess baryons and/or leptons. A possibility to generate sufficient amount with charge [Formula: see text] explain observed dark matter density atoms (which are bound states techniparticles n helium nuclei) considered in framework thermodynamic approach.
The split SUSY scenario with light Higgsino states is treated as an application to the dark matter problem. We have considered structure of neutralino–nucleon interaction and calculated cross-section scattering. decay properties lightest chargino next neutralino are analyzed in details.
We analyze the possibility of hadron Dark Matter carriers consisting singlet quark and light standard one. It is shown that stable quarks generate effects new physics which do not contradict restrictions from precision electroweak data. The neutral charged pseudoscalar low-lying states are interpreted as particle its mass-degenerated partner. evaluate their masses lifetime component describe potential asymptotes low-energy interactions these particles with nucleons each other. Some...
We consider the structure of excited states and low-energy interaction hadronic dark matter with photons, leptons, nucleons. Description lowest levels is fulfilled in an analogy standard heavy-light mesons. Using effective vertex new heavy hadrons W-boson, we calculate cross-section lepton scattering on particle. Analysis strong was carried out within meson-exchange model based dynamical realization SU(3)-symmetry. A nucleon also calculated using this model. The most essential...
We study possibilities to extend the Standard Model (SM) by three flavors of vectorlike heavy quarks in pseudoreal representation symplectic hypercolor gauge group. This extension SM predicts a rich spectra composite hypermesons and hyperbaryons (all them carry integer spins) including 14 pseudo-Nambu–Goldstone states emerging dynamical breaking global symmetry group H-quarks, [Formula: see text], its Sp(6) subgroup. The properties lightest depend strongly on choice heavy-quark hypercharges....
A new method for the synthesis of 2-(N-phenylamino)benzoic acids is presented, with 2-fluorobenzoic and anilines as starting materials. Several experimental conditions well factors influencing outcome reaction are described.
Research into the nature of matter is gradually advancing to a scale that still energetically inaccessible at ground-based colliders [...]