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U. E. Voznaya

Publications and source records attributed to U. E. Voznaya.

5 recordsLinked to original sources
arXiv2024

Higher-order NLO initial state QED radiative corrections to $e^+e^-$ annihilation revisited

Radiative corrections due to initial state radiation in electron-positron annihilation are calculated within the QED structure function approach. Results are shown in the next-to-leading logarithmic approximation up to $O(α^4 L^3)$ order, where $L=\ln(s/m_e^2)$ is the large logarithm. Several mistakes in previous calculations are corrected. The results are relevant for future high-precision experiments at $e^+e^-$ colliders.

hep-ph↗
arXiv2023

Higher-order NLO radiative corrections to polarized muon decay spectrum

Higher-order QED radiative corrections to muon decay spectrum are evaluated within the QED structure function approach in the next-to-leading order logarithmic approximation. New analytical results are given in the $\mathcal{O}\left(α^3 \ln^2(m_μ^2/m_e^2)\right)$ order. Earlier results in $\mathcal{O}\left(α^2 \ln^1(m_μ^2/m_e^2)\right)$ and $\mathcal{O}\left(α^3 \ln^3(m_μ^2/m_e^2)\right)$ orders are partially corrected. Numerical estimates of different contributions are presented.

hep-ph↗
arXiv2023

Unpolarized QED parton distribution functions in NLO

Perturbative solutions for unpolarized QED parton distribution and fragmentation functions are presented explicitly in the next-to-leading logarithmic approximation. The scheme of iterative solution of QED evolution equations is described in detail. Terms up to $\mathcal{O}(α^3L^2)$ are calculated analytically, where $L=\ln(μ_F^2/m_e^2)$ is the large logarithm which depends on the factorization energy scale $μ_F\gg m_e$. The results are process independent and relevant for future high-precision experiments.

hep-ph↗
arXiv2020

On the scale hierarchy in radiative symmetry breaking

The emergence of a scale hierarchy in the case of spontaneous radiative breaking of conformal symmetry is discussed using the example of a simple quantum field theory model. The Coleman-Weinberg mechanism is implemented in the one-loop approximation of the effective potential of a scalar field interacting with a fermion field. The emergence of a hierarchy between the renormalization scale and the magnitude of the scalar field vacuum expectation value is shown. An effective model in the vicinity of the effective potential minimum is constructed, and absence of a direct renormalization group transition to the original theory is established. It is shown that effective model parameters measurement in the infrared region allows us to determine the scale that limits the applicability region of the model.

hep-ph↗