Currently, there is no experimental evidences of the violation of the spatial parity (P) conservation in strong interactions. However, the in the QCD theory, the P-breaking term (so-called $\theta$-term) can be included, with tight limits on the $\theta$ parameter value. However, in the medium with high temperature and at large topological fluctuations [1] of QCD fields, expected in collisions...
We analyse and give the important details on the Gorishni-Isaev (massless) vacuum integrations. In particular, it has been shown how the delta-function represents either UV-regime or IR-regime. In the case of vacuum integration, we advocate the use of sequential approach to the singular generated functions (distributions).The sequential approach is extremely useful for many practical...
The mass formulas and decay constants of electrically charged and strange pseudoscalar mesons are analyzed within the combined framework of Nambu -- Jona-Lasinio model and the $1/N_c$ expansion up to $\mathcal O(1/N_c^2)$. The light quark masses explicitly violating $SU(3)_L\times SU(3)_R$ chiral symmetry of the strong interactions are taken to be of order $\mathcal O(1/N_c)$. The...
The associated production of $J/\psi+\gamma$ in proton-proton collisions is discussed theoretically for about 30 years [1], so it is relevant to make predictions for modern colliders energy: NICA ($27$ GeV), RICH ($200$ GeV), LHC ($13$ TeV). The differential cross section predictions were performed analytically and also using the KaTie event generator [2] both in an improved Color Evaporation...
A.V. Anufriev
Samara National Research University, Samara, 443086, Russia
V.A. Saleev
Samara National Research University, Samara, 443086, Russia and
Joint Institute for Nuclear Research, Dubna, 141980 Russia
Study of charmonium production at high energy in proton-proton collisions is important test of perturbative QCD, factorization approach and hadronization model in a heavy quark...
Following recent results, an overview of fractional analytic QCD beyond the leading order is presented. We demonstrate various representations, details of their derivation, and show the applicability of analytic QCD to the study of the Bjorken sum rule and the decay of the Higgs boson into a bb pair.
We have studied hidden-charm strong decays of the charmonium-like resonant state $Y(4320)$ within the framework of a confined quark model by interpreting the resonance as a four-quark state with molecular-type interpolating current. The strong decay of $Y$ into a vector and a scalar resonance, with the latter decaying, subsequently to a pair of charged pseudoscalar states, has been...
Rare $B$-meson decays due to the Flavor Changing Neutral Current (FCNC) $b\to s$ and $b\to d$ quark transitions are quite sensitive to New Physics effects because of the smallness of their decay width. The $b\to s$ transition has been intensively studied both experimentally and theoretically thanks to an enormous sample of $B$-mesons produced at electron-positron and hadron colliders....
Gell-Mann-Low functions in quantum field theory are usually defined as asymptotic expansions over a small coupling. However their behavior at large coupling is of principal interest, since this behavior sheds light on the general properties of the coupling parameter as a function of a scale variable. We developed an approach, called self-similar approximation theory, allowing for the...
A.A. Chernyshev
Samara National Research University, Samara, 443086, Russia
V.A. Saleev
Samara National Research University, Samara, 443086, Russia and
Joint Institute for Nuclear Research, Dubna, 141980 Russia
In the article, we study associated production of heavy quarkonia and $D$ mesons in the improved color evaporation model using the high-energy factorization as it is...
A workable basis of quark configurations s^3, s^2p and sp^2 at light front has been constructed to describe the high-Q^2 behavior of transition form factors in the electroproduction of the lightest nucleon resonances. High quality data of the CLAS Collaboration are described in the framework of a model which takes into account mixing of the quark configurations and hadron-molecular states. The...
The Geant4 FTF model is one of two hadronic models applied in the Geant4 package [1] for simulations of particle’s and nuclei interactions with matter. It is used in many practical applications. Thus, it is very important to tune the model parameters to reproduce known experimental data. In the last decade, a large amount of experimental data on proton-proton (pp), proton-nucleus (pA) and...
This report is dedicated to multiparticle production in lepton and hadron interactions, in particularly, the region of high multiplicity.
Our gluon dominance model allows us to describe multiplicity distributions in these processes. This model includes two stages: partonic and hadronization. It confirms the active role of gluons in multiparticle production. predicts a few collective...
There are some indications on the existence of two barion states, that are systems with barion
number 2(dibarion) and excitation energy lower than π0 mass. Such state according to barion
number conservation after its production decays into proton and neutron and has a mass MX =
Md + Eexc,where Md and Eexc are deuteron mass and excitation energy.
The simulations of dd collisions is...
The HGN (High Granular Neutron) detector is being developed for the BM@N (Barionic Matter at Nuclotron) experiment on the extracted beam line of the Nuclotron (JINR, Dubna) to measure the azimuthal flows of neutrons with energy range 400 - 4000 MeV produced in heavy-ion collisions at the beam energies 2 – 4 AGeV. This data together with data of azimuthal flows of charged particles, which will...
A new high-granular neutron detector is under development for the BM@N experiment, JINR, Dubna, Russia. Its task is to measure the anisotropic collective neutron flow in the energy range of 1-4 AGeV. This measurement is crucial for studying the symmetry energy term in the equation of state of strongly interacting hadronic matter. The detector is designed with a high-granular structure,...
