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Theory of Fundamental Interactions

• Calculation of the amplitudes in maximally supersymmetric theories in extra dimensions.
  
  Analysis of possible SUSY search strategies at the LHC in the framework of the MSSM and NMSSM.
  
  Calculation of the NLO correction to the BFKL equation in the N=2 SYM theory with matter fields.
  
  Investigation of the Q ² evolution of the average multiplicities with the double-logarithm resummation taken into account.
  
  Consideration of the Q ² evolution of the structure function F₂, its derivations and heavy quark parts at small x in the first three orders of perturbation theory.
  
  Investigation of the low-energy behavior of the hadronic vacuum polarization function within the dispersive approach to QCD.
  
  Calculation of different four-loop contributions to beta-functions and anomalous dimensions in the Standard Model and its supersymmetric and non-supersymmetric extensions.
  
  
• Derivation of constraints for properties of vector and scalar mesons implied by exact anomaly sum rules in axial and vector channels.
  
  Investigation of evolution of spin structure functions and their truncated moments at low Q ² in the NLO approximation and with account for models of coupling in the infrared region and higher twists.
  
  Investigations of transverse-momentum dependent parton distributions for Drell-Yan processes and direct photon production within NICA project. Construction of global fits for Sivers functions with account for evolution effects, constraints from g₂ structure functions and sum rules.
  
  Lattice calculations of form factors related to quark spin and orbital angular momenta and their comparison to the constraints implied by the equivalence principle.
  
  Studies of the mechanism of generation of reactor antineutrino anomaly in the framework of the field-theoretical approach to neutrino oscillations. Development of Monte-Carlo generators for optimization and processing of experimental data, PINGU (IseCube) experiment.
  
  Model calculations of production of mesons and photons and proton-antiproton collisions.
  
  
• Calculation of the light-by-light hadronic contribution to the muon g-2 for the full set of diagrams in the leading 1/N_c approximation.
  
  Calculation of the (, ') 2 decays and radiative , ' decays within the extended Nambu-Jona-Lasinio model.
  
  Derivation of the full set of evolution equations for the transverse-momentum dependent parton distribution functions basing on the results on geometrical and group properties of the Wilson loop space.
  
  Investigation of the role of non-Gaussian probability distributions in the description of the nonperturbative input in the phenomenology of the polarized semi-inclusive processes studied at the JLab, RHIC and future Electron-Ion Collider (EIC).
  
  Investigation of the form factors of the B(B_s) P(V)-transitions in the full kinematic region of momentum transfer squared. Calculation of the widths of the recently observed decays B_s J/+ and B_s J/+' which are important for the search of CP-violating New-Physics effects.
  
  Calculation of the branching ratios of the lowest (J/,_c(0 ⁺⁺)) charmonium decays into two (pseudo) scalar mesons on the base of obtained mixing coefficients of the intermediate scalar q-resonance state vectors with nearby glueball and/or multiquark states.
  
  
• Participation in the tmfT Collaboration (finite temperature with twisted mass fermions) aimed at description of the quark-gluon thermodynamics including strange and charmed quarks, consideration of new observables locating the crossover. Investigation of topological aspects of the quark-gluon plasma (monopoles, dyons, vortices etc.) and estimating the contribution of these degrees of freedom to trace anomaly, energy density etc. Evaluation of transport coefficients in the u-d-s-c-gluon plasma (jet quenching, heavy quark diffusion, dilepton rates etc.).
  
  Model calculations of the generation of vorticity in heavy-ion collisions and its effect on P-odd correlations of quarks and mesons at the NICA project.
  
  Investigation of the role of color degrees of freedom in the early stage of heavy-ion interactions within the model of Parton Hadron String Dynamics (PHSD), estimation of the intensity of chromoelectric and chromomagnetic fields created in collisions of relativistic heavy ions. Study of the influence of color forces on the dynamics of parton interactions.
  
  Study of the impact of strong electromagnetic fields (occurring during relativistic heavy-ion collisions) on the character of background gluon fields and the formation of a heterophase mixed hadron system within the domain model of the QCD vacuum. Investigation of observable manifestations of azimuthal anisotropy of the gluon fields in the collision region.
  
  Studies of the thermodynamic properties of non-uniform quark ensembles (quark droplets) on the basis of models with four-fermion interaction. The Keldysh model (featuring an infinite correlation length) will receive special attention.
  
  Further development of effective models for the QCD phase diagram to exhibit further observables (mesonic correlation functions, condensates and dual condensates) ready for comparison with lattice QCD data. Extension of PNJL and PQM models to include baryonic degrees of freedom to describe the region on non-vanishing net-baryon density.
  
  Study of hybrid EoS (equations of state) based on ab-initio nuclear EoS and non-local PNJL models in a wide range of densities, temperatures and isospin asymmetry, for applications in the simulation of heavy-ion collisions, of supernova collapse and in compact star phenomenology.
  
  

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