Conveners
Quantum chromodynamics at large distances
- Vladimir Dzhunushaliev (al-Farabi KazNU)
Quantum chromodynamics at large distances
- Andrey Radzhabov (Institute for System Dynamics and Control Theory SB RAS)
Understanding the internal structure of hadrons beyond the leading-twist approximation is essential for probing the non-perturbative dynamics of QCD. While high-$Q^2$ processes are dominated by gluon and sea quark dynamics, the low-$Q^2$ region requires non-perturbative modeling to capture the role of valence quarks and confinement. To address this, I investigate a wide range of distribution...
It has been shown in the framework of effective models that QCD phase diagram as in thee color case as well as in two color one possesses dualities.
It means that various phenomena are dual with respect to each other. Then dualities were shown in a more and more general setings. And then finally dualities has been shown from first principles,
three dualities as in two color QCD and one in...
We study the effect of finite spin quark density on the chiral and deconfinement thermal crossovers using numerical simulations of lattice QCD with two dynamical light quarks. The finite spin density is introduced by the quark spin potential in the canonical formulation of the spin operator. We show that both chiral and deconfinement temperatures are decreasing functions of the spin potential....
The hadronic light-by-light (HLbL) contribution to the muon anomalous magnetic moment is calculated within a nonlocal quark model incorporating scalar--pseudoscalar and vector--axial-vector interactions.
Both resonance contributions and contact terms are included in the calculation.
For the non-strange quark loop, the obtained contribution is
$
a_{\mu}^{\mathrm{HLbL,\,Loop}} = (93 \pm...
We investigate the properties of SU(3) gluon plasma at high temperature under acceleration using lattice simulations in Rindler spacetime. Our results reveal a spatial crossover transition from confinement to deconfinement opposite to the direction of acceleration, consistent with the Tolman-Ehrenfest (TE) law. Using this law, we renormalize the Polyakov loop in Rindler space. Additionally, we...
SU(2) QCD have previously been extensively studied and it was found, that qualitatively it possesses similar properties to it's real version with SU(3) color gauge group. Some of those properties, confinement-deconfinement transition and chiral symmetry restoration, are of a great interest. Thus, studying it's properties may help in understanding those of a real QCD. In addition, SU(2) QCD has...
We extend our theoretical study of the Bjorken sum rule for polarized DIS by building on recent Jefferson Lab data for the nucleon spin structure in the infrared region of small transferred momenta $Q^2<1$ GeV$^2$, where the higher order perturbative corrections and higher-twist contributions play a significant role.
Our theoretical approach is based on the analytic perturbation theory and an...
The TMD factorization is a consistent framework to describe hadron processes at small transverse momenta [1], though there are several approaches for modeling TMD parton distributions. The Soft Gluon Resummation approach is such a model that allows to express TMD parton distributions via collinear ones and nonperturbative phenomenological part [2]. Evolution of perturbative part is controlled...
Within Yang-Mills-Proca theory with external sources, regular, finite energy solutions are obtained. It is shown that color electric/magnetic fields have two components: the first part is a gradient/curl component,
respectively, and the second part is a nonlinear component. It is shown that the color electric field has an Y-like spatial distribution.
Such an Y-like behavior arises because...
The bounds on the light quark masses are obtained by fitting the squares of pseudoscalar meson masses $m^2_\pi$ and $m^2_K$ to second order in $1/N_c$ expansion. It is shown that the values of the quark mass ratios $x=m_u/m_d$ and $y=m_s/m_d$ belong to the third order algebraic curve $f(x,y)=0$. Two parameters of the curve are fractional linear functions of the squared masses of $\pi$ and $K$...
