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arXiv · 2604.24457

Field-theoretical description of the deuteron breakup in the clothed particle representation

O. Shebeko·A. Arslanaliev·Y. Kostylenko·V. Chahar·J. Golak·H. Kamada·W. N. Polyzou·D. Ramírez·R. Skibiński·K. Topolnicki·H. Witała
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Abstract

We present a field-theoretical description of the deuteron electrodisintegration reaction d(e,e'p)n induced by unpolarized and polarized electrons. The approach combines the Lehmann-Symanzik-Zimmermann in(out) formalism with the clothed particle representation in the instant form of relativistic dynamics, providing a fully relativistic and gauge-independent framework based on the Fock-Weyl criterion. Within the method of unitary clothing transformations, one and the same transformation that generates the relativistic nucleon-nucleon interaction (the Kharkiv potential) also induces a fresh family of electromagnetic current operators. As a result, one-body and two-body (meson-exchange) currents emerge on a common footing. We compute differential cross sections and polarization observables with the inclusion of final-state interaction effects and meson-exchange current contributions, and compare the results with Saclay and Jefferson Lab data as well as with earlier theoretical predictions. The role of relativistic ingredients (one- and two-body currents, Fermi-motion effects, etc.) and the interplay between them are analyzed in several kinematic regimes of the experiments at Saclay and Jefferson Lab.

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O. Shebeko, A. Arslanaliev, Y. Kostylenko, V. Chahar, J. Golak, H. Kamada, W. N. Polyzou, D. Ramírez, R. Skibiński, K. Topolnicki, H. Witała. 2026-04-27. Field-theoretical description of the deuteron breakup in the clothed particle representation. https://arxiv.org/abs/2604.24457

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