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Your search keyword '"Alexei Prokudin"' showing total 2 results
Start Over Author "Alexei Prokudin" Journal journal of high energy physics
2 results on '"Alexei Prokudin"'

1. Extraction of the Sivers function from SIDIS, Drell-Yan, and W ± /Z boson production data with TMD evolution

Author

Marcin Bury, Alexei Prokudin, and Alexey Vladimirov

Subjects
Deep Inelastic Scattering (Phenomenology), NLO Computations, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract We perform a global fit of the available polarized Semi-Inclusive Deep Inelastic Scattering (SIDIS), polarized pion-induced Drell-Yan (DY) and W ± /Z boson production data at N3LO and NNLO accuracy of the Transverse Momentum Dependent (TMD) evolution, and extract the Sivers function for u, d, s and for sea quarks. The Qiu-Sterman function is determined in a model independent way via the operator product expansion from the extracted Sivers function. The analysis is supplemented by additional studies, such as the estimation of applicability region, the impact of the unpolarized distributions’ uncertainties, the universality of the Sivers functions, positivity constraints, the significance of the sign-change relation, and the comparison with the existing extractions.

Published
2021
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2. Semi-inclusive deep-inelastic scattering in Wandzura-Wilczek-type approximation

Author

B. Musch, Kemal Tezgin, S. Bastami, B. Parsamyan, Aram Kotzinian, Peter Schweitzer, Harut Avakian, A. V. Efremov, M. Schlegel, G. Schnell, and Alexei Prokudin

Subjects
odd fragmentation functions, Nuclear and High Energy Physics, Particle physics, parton distributions, QC1-999, Hadron, Drell-Yan, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, deep inelastic scattering (phenomenology), HERMES polarized hydrogen, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Compass, quark polarization, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Twist, 010306 general physics, Particle Physics - Phenomenology, Deep Inelastic Scattering (Phenomenology), Physics, Lorentz invariance relations, hep-ex, 010308 nuclear & particles physics, Scattering, state interactions, sum-rules, Structure function, ddc:530, single-spin asymmetries, hep-ph, Deep inelastic scattering, QCD phenomenology, 530 Physik, QCD Phenomenology, High Energy Physics - Phenomenology, lcsh:QC770-798, High Energy Physics::Experiment, Phenomenology (particle physics), azimuthal asymmetries, Particle Physics - Experiment
Abstract

We present the complete cross-section for the production of unpolarized hadrons in semi-inclusive deep-inelastic scattering up to power-suppressed ${\cal O}(1/Q^2)$ terms in the Wandzura--Wilczek-type approximation which consists in systematically assuming that $\bar{q}gq$--terms are much smaller than $\bar{q}q$--correlators. We compute all twist-2 and twist-3 structure functions and the corresponding asymmetries, and discuss the applicability of the Wandzura--Wilczek-type approximations on the basis of available data. We make predictions that can be tested by data from Jefferson Lab, COMPASS, HERMES, and the future Electron-Ion Collider. The results of this paper can be readily used for phenomenology and for event generators, and will help to improve our understanding of the TMD theory beyond leading twist., Comment: Published in JHEP, 71 pages, 21 figures, references updated, discussion improved

Published
2019

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