
 
  Status:  Approved for completion in 2018


Theory of Fundamental Interactions
Leaders:  D.I. Kazakov O.V. Teryaev A.B. Arbuzov 
Participating Countries and International organizations: Armenia, Azerbaijan, Belarus, Bulgaria, Canada, CERN, China, Czech Republic, Finland,
France, Georgia, Germany, Hungary, ICTP, Italy, Japan, Kazakhstan, Mexico, Mongolia,
Nederlands, New Zeland, Norway, Portugal, Poland, Republic of Korea, Russia, Serbia,
Slovakia, Spain, Sweden, Switzerland, USA, Ukraine, United Kingdom, Uzbekistan, Vietnam.
Scientific Programme: The main aim of the research within the theme is the construction of
theoretical models and their application to the description of
properties of elementary particles and their interactions. This research
includes the following directions of activity. The development of
quantum field theory formalism in gauge and supersymmetric theories.
Construction and investigation of the models of particle physics beyond
the Standard Model. Theoretical support of experiments at the Large
Hadron Collider on the search of new physics and the study of the
properties of the Higgs boson. Calculation of radiative corrections to
the processes of particle creation within the Standard Model and its
extensions. Investigation of neutrino properties and neutrino
oscillations. Investigation of the hadron properties within quantum
chromodynamics and phenomenological quark models. Study of the hadron spin
structure with the help of generalized and transverse momentum dependent
parton distributions. Study of heavy quark properties and exotic
hadrons. Lattice simulations for obtaining nonperturbative results in
gauge theories. Investigation of dense hadronic matter and theoretical
support of the program NICA. Theoretical support of a wide range of
current and future experiments at JINR, IHEP, CERN, GSI, DESY and other
physics centers.
Expected main results in 2018:

Investigation of the arbitrariness in divergence subtraction procedure
in supersymmetric theories in higher dimensions and calculation of the
leading counterterms in all orders of perturbation theory.
Theoretical support of search for new physics at the LHC based on
experimental data from ATLAS and CMS.
Theoretical study of supersymmetric models of Dark matter and analysis of
experimental data on direct and indirect Dark matter search.
Investigation of the effects due to radiative corrections in DrellYan
processes after increasing LHC luminosity and beam energy.
Studies of parton densities in nuclei.
Investigation of highenergy asymptotics of the structure functions F2 and
FL and their heavy quark parts.
Development of the method that would enable one to account for the effects
due to continuation of the perturbative QCD results into the timelike domain, at
an arbitrary order of perturbation theory.
Calculation of highorder corrections to renormalizationgroup functions
and theoretical analysis of their influence on predictions in particle physics and in
studies of critical phenomena.
Analysis of ambiguities in highorder calculations of different
renormalizationgroup functions in QFT models with chiral interactions.
Theoretical study of rare higgsboson decays predicted in some New Physics models.
Development of twistor and ambitwistor description of multiloop form factors of
local and Wilson line operators in theories with extended supersymmetry. Study and
development of twistor description for loop reggeon amplitudes.
Studies of the dark matter problem in the framework of the Standard Model
and beyond it, including its supersymmetric generalizations. Building of
Minimal Consistent Dark Matter models. Development of the strategy of
comparing/mapping of their parameters for results of searches.
 Calculation of quarkgluon subprocess contribution to exclusive DrellYan process
amplitude, estimate of its observability at CMS, COMPASS and NICA.
Investigation of relations between meson distribution amplitudes and gluonic poles
in twist 3 correlators and their manifestations for matching of various
kinematical regimes of pionnucleon DrellYan process.
Investigations of connection between mechanisms of hyperon polarization in
hadronic and heavyion collisions and duality between fieldtheoretical and
hydrodynamical descriptions of spin effects.
Generalization of QCD lowenergy theorems for gluonic anomaly accounting for
effects of mixing and contributions of heavy quarkonia and gluonia.
Common analysis of azimuthal asymmetries in SIDIS in perturbative and
nonperturbative QCD.
Lattice calculations of heavy quarkonia polarizabilities and investigation of
their relations with charmed pentaquark spectroscopy.
Development of methods of extrapolation of parton distributions to lowx domain
using the truncated moments and their applications to fragmentation functions.
 Study of semileptonic Bmeson decay with taulepton in the final
state and the subsequent leptonic and semihadronic taudecays.
Investigation of new observables in the Standard Model as well as in different newphysics scenarios.
Study of spectra of light atoms and molecules in higher
orders of the fine structure constant for determination of the improved
values of the fundamental physical constants and resolution of the proton
charge radius problem.
Calculation of the hadronic lightbylight contributions to the muon anomalous magnetic moment in the
leading and nexttoleading orders in the 1/N_{c} parameter.
Study of the properties of the f1, a1, K1 axialvector mesons in
ground and radially excited states, their strong and electromagnetic
hadron decays and production in e+e colliding beams and taulepton decays.
Calculation of masses and decay constants of exotic glueballs within QCD sum rules.
Study of the glueball dynamics by strong coupling expansion of the SU(3) YangMills Hamiltonian in the
fluxtube gauge. Study of the multiquark hadrons and existence of the extraneous dibaryons.
Calculation of the contributions of light mesons to the hyperfine structure of muonic hydrogen.
Calculations of two loop contributions for Moeller scattering and DrellYan
process within the Standard Model, radiative corrections
evaluation to the process of antiprotonproton annihilation into a lepton
pair and a pair of mesons for the PANDA facility.
Studies pertaining to the QCD vacuum and QCD phase diagram (also in the presence of a strong magnetic field): the role of strangeness and multiquark
interactions in the characteristics of the low lying meson nonets, in the freezeout region of relativistic heavyion experiments, in the position
of the critical end point, and in the regime of dense matter relevant for compact stars.
Studies of the highdensity equations of state and massradius observations for compact stars and multipolytrope approach to a strong firstorder
phase transition that produces highmass twin stars as an observable signature of it.
 Participation (continuation) in the tmfT Collaboration (finite temperature with twisted mass fermions in lattice QCD) aimed at description of the quarkgluon
thermodynamics including strange and charmed quarks and consideration of new observables indicating the crossover. Study of the gluon spectral
function at finite temperature (longitudinal and transversal). Completion of the work on the EoS via trace anomaly. Study of the temperature dependence of the topological
susceptibility and obtaining of more detailed results on topological structure supporting evidence for dyons.
For N_{f}=2 with imaginary chemical potential µ extending gluon and ghost
propagator from imaginary to real µ.
Finite µ for SU(2) QCD: study of the phase diagram.
Study of anomalous transport phenomena in QGP, calculation of the bulk viscosity, properties of QCD with nonzero chiral chemical potential.
Study of the role of viscosity effects at the hydrodynamic stage of the system evolution for the multiplicity of created particles (mainly pions) and
the transverse momentum spectra using the IsraelStewart secondorder equations. Rapidity distributions as well as transverse momentum spectra
of identified hadrons (including strange particles) produced in the NICA energy range.
The hadronic part of the EoS at finite temperatures will be constructed including the first two SU(3) multiplets in baryon (octet of spin 1/2
and decuplet of spin 3/2 particle) and meson (octet of pseudoscalar meson and nonet of vector mesons) sectors.
Construction of a new class of hybrid EoS with firstorder phase transition fulfilling constraints from nuclear physics and compact star observations.
Providing of EoS tables with and without phase transition for HIC simulation.
Performing of analytical calculations for the ultrarelativistic transverse momentum distributions for the Tsallis3 and Renyi statistics.
Evaluation of correlation functions for an ensemble of domain wall networks representing nonperturbative QCD vacuum by employing methods of analytical
and numerical multidimensional integration.
Calculation of the oneloop effective potential for arbitrary Abelian gluon fields in finite volume for various boundary conditions. Investigation
of the stabilization of the domain size due to the quark lowest modes.
Study of the role of strong electromagnetic fields as trigger of deconfinement transition.
Investigation of the anisotropic stage of the QGP evolution and the dependence of the approach to thermal equilibrium on the breaking of scale
invariance based on analytic black brane solutions with nonconformal asymptotics for the 5dimesional gravity with a dilaton corresponding to a dual description of QGP.
Investigation of the critical behavior of a system consisting of scalar and fermion
fields: relations between the scalar and fermion condensates and the masses
of the particles in this system for the case of zero temperature.
 A detailed statistical analysis of available acclerator data on
exlusive (anti)neutrinonucleus interactions at low and intermediate
energies will be performed aiming at the extration of the electroweak
axialvector current parameters. The results will be claimed in the
current and future oscillation experiments with accelerator and
atmospheric experiments (NOvA, DUNE, Super and HyperKamiokande, etc.).
The cross sections of processes involving neutrinos are expressed
through the neutrino mixing matrix. It will be shown that the
probabilities of all processes can be represented in an equivalent way
explicitly in terms of the neutrino mass matrix. The existence of such
representations allows fitting of the mass matrix of neutrinos directly
from the experimental data.
Starting from the variational energy principle, the equations of
hydrostatic equilibrium of stars will be derived without assuming the
local electroneutrality of matter. We will find the first and second
unconditional variational derivatives of the interaction energy, as well
as the conditional variational derivatives along the constraint surface
"fixed total charge of the star". The effect of deviations from the
local electroneutrality on neutrino spectra in supernovae will be
calculated. The stability criteria of the solutions, associated with the
positive definiteness of the second variations, will be studied.
The process of double beta decay of the nucleus with the capture of
one of the betaelectrons on the outer electron shell of the atom will
be studied. This problem is of interest in connection with the
experiment of the NEMO 3 and SuperNEMO collaboration. The possibility
that one or both electrons emitted from the nucleus in neutrinoless
double beta decay might
undergo an inelastic collision with the bound electrons in the atomic
shell and either shift them to a higher energy level (excitation) or
eject them from the atom (ionization) will also be studied.
In a number of generalizations of the Standard Model, the existence
of a neutrino condensate is predicted. This scenario will be analyzed
from the point of view of the effect produced by the condensate on the
probability of neutrinoless double beta decay of nuclei.
The Rparity breaking SUSY mechanisms of the neutrinoless double beta
decay will be revised following the current SUSY phenomenology. The
importance of the one and two pion exchange in this process will be
discussed. The corresponding nuclear matrix elements will be calculated
within the QRPA with isospin symmetry restoration.
The electron neutrino mass can be determined by the upper end of the
deexcitation (bolometer) spectrum of ^{163}Dy after electron capture in
^{163}Ho. All deexcitation spectra (X rays, Auger electron and the recoil
of Holmium) end at the Q value minus the neutrino mass. Recently, the
theoretical spectra were calculated by including also the second hole in
the atomic excitations of dysprosium. The impact of
the internal bremsstrahlung electron capture process on the end of
deexcitation spectra will be studied.
The uncertainties in the calculated reactor antineutrino spectrum will be
evaluated. For that purpose, the improved theoretical description of the
first forbidden beta decays will be obtained by considering the exact
Dirac wave functions of the electron with finite nuclear size and
electron screening taken into account.
Within a fieldtheoretical approach with wave packets, the offshell
regime of neutrino oscillations will be investigated; the regime works
at supershort distances between the source and detector.
List of Activities   Activity or experiment  Leaders  
 Laboratory or other Division of JINR  Main researchers

1.  Standard Model and its extension  D.I. Kazakov A.B. Arbuzov 


BLTP
 A.N. Baushev, A.V. Bednyakov, A.V. Gladyshev, A.V. Kotikov,
G.A. Kozlov, V.K. Mitrjushkin, V.A. Naumov,
A.V. Nesterenko, A.I. Onishenko, S.I. Vinitsky + 5 students


VBLHEP
 R.R. Ahunzyanov, V.G. Krivokhizhin, A.P. Nagaytsev,
B.G. Shaythatdenov,


DLNP
 V.A. Bednyakov, L.B. Kalinovskaya

2.  QCD parton distributions for modern and future colliders  A.V. Efremov O.V. Teryaev 


BLTP
 I.V. Anikin, M. Deka, S.V. Goloskokov, S.V. Mikhailov,
A.V. Nesterenko, A.V. Radyushkin, O.V. Selyugin,
A.V. Sidorov + 3 students


VBLHEP
 Yu.I. Ivanshin, I.A. Savin


DLNP
 A.S. Khrykin, L.L. Nemenov, L.G. Tkatchev

3.  Physics of heavy and exotic hadrons  A.E. Dorokhov M.A. Ivanov 


BLTP
 D. Alvarez, D. Aznabayev, A. Bekbayev, Yu.M. Bystritsky, G. Ganbold, S.B. Gerasimov,
S.M. Eliseev, A.H. Issadykov, N.I. Kochelev, V.I. Korobov, L. Martinosov,
V.A. Meshcheryakov, S.N. Nedelko, A.A. Osipov, H.P. Pavel, Yu.S. Surovtsev, Zh. Tuylemisov, M.K. Volkov,
S.A. Zhaugasheva + 5 students


VBLHEP
 Yu.I. Ivanshin, V.A. Nikitin, Yu.A. Panebratsev, I.A. Savin, M.G. Sapozhnikov, M.V. Tokarev, Zh. Tuylemisov,
V.A. Zykunov


DLNP
 V.A. Bednyakov, N.B. Skachkov

4.  Hadron Matter under extreme conditions  E.M. Ilgenfritz S.N. Nedelko D. Blaschke 


BLTP
 D.E. AlvarezCastillo, V. Braguta, M. Deka, S. Dorkin, A.E. Dorokhov,
A.V. Friesen, A.A. Golubtsova, M. Hnatic, M. Hasegawa, L. Kaptari, A.S. Khvorostukhin, E.E. Kolomeitsev, N. Korchagin,
N.I. Kochelev, K. Maslov, S. Pandiat, A. Parvan, A.M. Snigirev,
O.V. Teryaev, V.D. Toneev, V.E. Voronin, D. Voskresensky
+ 4 students


LIT
 A.S. Ayriyan, H. Grigorian, Yu.L. Kalinovsky


VBLHEP
 O.V. Rogachevsky, V. Voronyuk

5.  Fundamental properties of Neutrinos  V.A. Naumov M.I. Krivoruchenko F. Simkovic 


BLTP
 A. Babic, K.S. Kuzmin, D.S. Shkirmanov


DLNP
 I.A. Belolaptikov, V.B. Brudanin, R. Dvornický, O.I. Kochetov, D.V. Naumov,
Petrova O.N., O.Yu. Smirnov, V.I. Tretyak

Collaboration 
Country or International Organization  City  Institute or Laboratory 
Armenia
 Yerevan
 Foundation ANSL



 RAU


Azerbaijan
 Baku
 IP ANAS


Belarus
 Minsk
 INP BSU



 IP NASB



 JIPNRSosny NASB


 Gomel
 GSU



 GSTU


Bulgaria
 Sofia
 INRNE BAS



 SU


Canada
 Corner Brook
 MUN


 Montreal
 UdeM


CERN
 Geneva
 CERN


Chile
 Valparaiso
 UV


China
 Beijing
 PKU


 Lanzhou
 IMP CAS


 Wuhan
 WIPM CAS


Czech Republic
 Prague
 IP ASCR



 CTU



 CU


 Rez
 NPI ASCR


Finland
 Helsinki
 UH


France
 Lyon
 UCBL


 Metz
 UPVM


 Montpellier
 UM2


 Paris
 UPMC


 Saclay
 SPhN CEA DAPNIA



 IRFU


Georgia
 Tbilisi
 RMI TSU



 TSU


Germany
 Berlin
 FU Berlin



 HUB


 Aachen
 RWTH


 Bielefeld
 Univ.


 Bochum
 RUB


 Bonn
 UniBonn


 Dortmund
 TU Dortmund


 Erlangen
 FAU


 Hamburg
 DESY



 Univ.


 Heidelberg
 Univ.


 Jena
 Univ.


 Julich
 FZJ


 Kaiserslautern
 TU


 Karlsruhe
 KIT


 Regensburg
 UR


 Rostock
 Univ.


 Mainz
 JGU



 HIM


 Munich
 LMU


 Tubingen
 Univ.


 Wuppertal
 UW


 Zeuthen
 DESY


Hungary
 Budapest
 ELTE



 Wigner RCP


ICTP
 Trieste
 ICTP


Italy
 Naples
 INFN


 Padua
 UniPd


 Pavia
 INFN


 Pisa
 INFN


 Trieste
 SISSA/ISAS


 Turin
 UniTo


Japan
 Tokyo
 UT



 Tokyo Tech


 Kyoto
 Kyoto Univ.


 Nagoya
 Meiji Univ.



 Nagoya Univ.


 Tsukuba
 KEK


Kazakhstan
 Almaty
 APHI



 INP


 Astana
 BA INP


Mexico
 Cuernavaca
 UNAM


Mongolia
 Ulaanbaatar
 IPT MAS



 NUM


New Zealand
 Hamilton
 Univ.


Norway
 Trondheim
 NTNU


Poland
 Krakow
 NINP PAS


 Kielce
 JKU


 Lodz
 UL


 OtwockSwierk
 NCBJ


Portugal
 Coimbra
 UC


Republic of Korea
 Seoul
 SNU


 Daegu
 KNU


 Chongju
 CBNU


Russia
 Moscow
 IMM RAS



 ITEP



 LPI RAS



 MSU



 MI RAS



 PFUR



 SCC RAS



 SINP MSU


 Moscow, Troitsk
 INR RAS


 Belgorod
 BelSU


 Chernogolovka
 LITP RAS


 Gatchina
 NRC KI PNPI


 Irkutsk
 ISDCT SB RAS


 Ivanovo
 ISÑ RAS



 ISU


 Kazan
 KFU


 Novosibirsk
 IM SB RAS



 BINP SB RAS


 Omsk
 OmSU


 Perm
 PSNRU


 Protvino
 IHEP


 RostovonDon
 SFedU


 St. Petersburg
 SPbSU



 SPbSPU


 Samara
 SSU



 SU


 Saratov
 SSU


 Sarov
 VNIIEF


 Tomsk
 TSU



 IHCE SB RAS


 Tver
 TvSU


 YoshkarOla
 VSUT


Serbia
 Belgrade
 Univ.


Slovakia
 Bratislava
 CU



 IP SAS


 Kosice
 IEP SAS


Spain
 Santiago de Compostela
 USC


 Valencia
 UV


Sweden
 Lund
 LU


Switzerland
 Bern
 Uni Bern


Ukraine
 Kiev
 BITP NASU


 Dnepropetrovsk
 DNU


 Kharkov
 NSC KIPT


 Lutsk
 VNU


 L'viv
 IAPMM NASU



 IFNU


 Sumy
 SumSU


United Kingdom
 London
 QM



 Imperial College


 Canterbury
 Univ.


USA
 New York, NY
 RU



 CUNY


 College Park, MD
 UMD


 Lemont, IL
 ANL


 Minneapolis, MN
 U of M


 Norman, OK
 OU


 Newport News, VA
 JLab


 Philadelphia, PA
 Penn


 University Park, PA
 Penn State


Uzbekistan
 Tashkent
 IAP NUU



 NUU


Vietnam
 Hanoi
 IOP VAST


