Публикации в зарубежных изданияхhttps://elib.gstu.by/handle/220612/261232026-05-16T18:11:53Z2026-05-16T18:11:53ZDalitz decays of vector mesons in relativistic quark modelHaurysh, V.Yu.Andreev, V. V.https://elib.gstu.by/handle/220612/491122026-05-15T07:13:53Z2026-05-15T06:04:37Z2026-05-15T06:04:37ZHaurysh, V.Yu.Andreev, V. V.In the course of work, basing on the previously developed method for calculating integral representations of decay constants for pseudoscalar and vector mesons in the frame of point form of Poincar´e-covariant quark model, the research of ω– and φ–mesons decays form-factors for Dalitz V(qǬ) → P(qǬ) ℓ⁺ℓ⁻ decays has been carried out. It is shown that the usage of the pseudoscalar density constant with integral representations of decay constants P(qǬ) → ℓνe, V(qǬ) → ℓ⁺ℓ⁻ and ℓ → P(qǬ)νe leads to parameters which can be used for the study of V(qǬ) → P(qǬ)ℓ⁺ℓ⁻ decay form-factors. As a result of the work, the behaviour of Fωπγ∗(t) and Fφηγ∗(t) form-factors compared with the experimental data in the interval q < 0.5 GeV is researched.Low-energy QCD Calculations with Package "FAPT"Khandramai, V.Prokopenko, D.https://elib.gstu.by/handle/220612/490172026-05-13T11:14:10Z2026-05-13T10:42:53Z2026-05-13T10:42:53ZKhandramai, V.Prokopenko, D.We consider computational problems in the framework of non power Analityc Perturbation Theory and Fractional Analytic Perturbation Theory that are the generalization of the standard QCD perturbation theory. The singularity-free, finite couplings Av(Q2), v ( s) appear in these approaches as analytic images of the standard QCD coupling powers avs(Q2) in the Euclidean and Minkowski domains, respectively. We provide a package "FAPT" based on the system Mathematica for QCD calculations of the images Av(Q2), v(s) up to N3LO of renormalization group evolution. Application of these approaches to Bjorken sum rule analysis and Q2 -evolution of higher twist µ p-n is considered.The QCD analysis of xF3 structure function based on the analytic approachSidorov, A. V.Solovtsova, O. P.https://elib.gstu.by/handle/220612/490152026-05-13T11:14:11Z2026-05-13T10:33:40Z2026-05-13T10:33:40ZSidorov, A. V.Solovtsova, O. P.We apply analytic perturbation theory to the QCD analysis of the xF3 structure function data of the CCFR collaboration. We use a different approaches for the leading order Q2 evolution of xF3 structure function and compare the extracted values of the parameter A and the shape of the higher twist contribution. Our consideration is based on the Jacobi polynomials expansion method of the unpolarized structure function. The analysis shows that the analytic approach provides a reasonable results in the leading order QCD analysis.Spin determination and model identification of Z′ bosons at the LHCGulov, A. V.Pankov, A. A.Skalozub, V. V.Tsytrinov, A. V.https://elib.gstu.by/handle/220612/490032026-05-13T09:14:03Z2026-05-13T08:42:07Z2026-05-13T08:42:07ZGulov, A. V.Pankov, A. A.Skalozub, V. V.Tsytrinov, A. V.Bounds on the mass and mixing of Z′-bosons from LEP2 experimental dataAndreev, V. V.Pankov, A. A.https://elib.gstu.by/handle/220612/490002026-05-13T09:14:05Z2026-05-13T08:35:37Z2026-05-13T08:35:37ZAndreev, V. V.Pankov, A. A.The Bjorken sum rule: how far can perturbative theory penetrate to nonperturbative region?Solovtsova, O. P.Teryaev, O. V.Khandramai, V. L.https://elib.gstu.by/handle/220612/489982026-05-13T09:14:05Z2026-05-13T08:26:12Z2026-05-13T08:26:12ZSolovtsova, O. P.Teryaev, O. V.Khandramai, V. L.Z-Z′ mixing and its determination at the LHC and ILCAndreev, V. V.Pankov, A. A.Serenkova, I. A.Tsytrinov, A. V.https://elib.gstu.by/handle/220612/489942026-05-13T09:14:04Z2026-05-13T07:40:05Z2026-05-13T07:40:05ZAndreev, V. V.Pankov, A. A.Serenkova, I. A.Tsytrinov, A. V.New heavy neutral gauge bosons Z′ are predicted by many models of physics beyond the Standard Model. The potential for measuring the Z′W +W − coupling in W +W − pair production at the LHC is investigated. Also, we discuss the foreseeable sensitivity to Z′s of W ±-pair production cross sections at the e+e− ILC. We show that the sensitivity of the ILC for probing the Z-Z′ mixing is substantially enhanced when the polarization of the initial beams and the produced W ± bosons are considered.