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pro vyhledávání: '"Mikhailov, S. V."'
Autor:
Mikhailov, S. V.
Publikováno v:
Journal of High Energy Physics 10(2024)166
Different ways exist to obtain the elements of the $\{\beta \}$-expansion for renormgroup invariant quantities. Here we consider independent confirmation within the standard QCD of a number of our results [1] for the values of elements of this expans
Externí odkaz:
http://arxiv.org/abs/2406.15014
Autor:
Mikhailov, S. V., Volchanskiy, N.
We calculate the two-point massless QCD correlator of nonlocal (composite) vector quark currents with chains of fermion one-loop radiative corrections inserted into gluon lines. The correlator depends on the Bjorken fraction $x$ related to the compos
Externí odkaz:
http://arxiv.org/abs/2307.13458
Autor:
Mikhailov, S. V., Volchanskiy, N.
Publikováno v:
Physics of Particles and Nuclei Letters 20, 296--299 (2023)
We calculate, within massless QCD, a two-point correlator of nonlocal (composite) vector quark currents with arbitrary-length chains of the simplest fermion loops being inserted into gluon lines. Within the large $n_f$ (or large $\beta_0$) approximat
Externí odkaz:
http://arxiv.org/abs/2301.01806
Autor:
Baikov, P. A., Mikhailov, S. V.
Publikováno v:
JHEP09(2022)185
We derive explicit expressions for the elements of the $\{ \beta \}$-expansion for the nonsinglet Adler $D_A$-function and Bjorken polarized sum rules $S^{Bjp}$ in the N$^4$LO using recent results by Chetyrkin for these quantities computed within ext
Externí odkaz:
http://arxiv.org/abs/2206.14063
Autor:
Mikhailov, S. V., Stefanis, N. G.
Publikováno v:
Phys. Rev. D 104, 096103 (2021)
We discuss cross-link relations between the $\pi$ and $\rho$-meson channels emerging from two different descriptions of the QCD vacuum: Instanton physics and QCD sum rules with nonlocal condensates (NLC). We derive in both schemes an intriguing linea
Externí odkaz:
http://arxiv.org/abs/2106.15522
Publikováno v:
Phys. Rev. D 103, 096003 (2021)
We show that using renormalization-group summation to generate the QCD radiative corrections to the $\pi-\gamma$ transition form factor, calculated with lightcone sum rules (LCSR), renders the strong coupling free of Landau singularities while preser
Externí odkaz:
http://arxiv.org/abs/2101.12661
Autor:
Mikhailov, S. V., Volchanskiy, N.
Publikováno v:
J. High Energ. Phys. 2021, 197 (2021)
We present analytical results for massless correlators of two vector, tensor, and scalar composite vertices with the Bjorken fractions $x$ and $y$ of order $\alpha_s^2 \beta_0$ of QCD. The structure of these correlators $\Pi^\text{V,T,S}(x,y; p^2)$ a
Externí odkaz:
http://arxiv.org/abs/2010.03557
Akademický článek
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Publikováno v:
EPJ Web Conf. 222 (2019) 03017
We consider the lightcone sum-rule (LCSR) description of the pion-photon transition form factor in combination with the renormalization group of QCD. The emerging scheme represents a certain version of Fractional Analytic Perturbation Theory and sign
Externí odkaz:
http://arxiv.org/abs/1911.02845
Autor:
Mikhailov, S. V., Volchanskiy, N.
Publikováno v:
J. High Energ. Phys. 01 (2019) 202
We consider the most general two-loop massless correlator $I(n_1,n_2,n_3,n_4,n_5; x,y;D)$ of two composite vertices with the Bjorken fractions $x$ and $y$ for arbitrary indices $\{n_i\}$ and space-time dimension $D$; this correlator is represented by
Externí odkaz:
http://arxiv.org/abs/1812.02164