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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Bound state structure and electromagnetic form factor beyond the ladder approximation

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Gigante, V. ; Alvarenga Nogueira, J. H. ; Ydrefors, E. ; Gutierrez, C. ; Karmanov, V. A. ; Frederico, T.
Total Authors: 6
Document type: Journal article
Source: Physical Review D; v. 95, n. 5 MAR 10 2017.
Web of Science Citations: 8

We investigate the response of the bound state structure of a two-boson system, within a Yukawa model with a scalar boson exchange, to the inclusion of the cross-ladder contribution to the ladder kernel of the Bethe-Salpeter equation. The equation is solved by means of the Nakanishi integral representation and light-front projection. The valence light-front wave function and electromagnetic form factor, considering both ladder and ladder plus cross-ladder kernels, are studied in detail. Their asymptotic forms are found to be quite independent of the inclusion of the cross-ladder kernel, for a given binding energy. The asymptotic decrease of form factor agrees with the counting rules. This analysis can be generalized to fermionic systems, with a wide application in the study of the meson structure. (AU)

FAPESP's process: 15/22701-6 - Theory of relativistic few-body systems and its applications to hadrons and nuclei
Grantee:Tobias Frederico
Support type: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 14/19094-8 - Three-body heavy meson decay and CP violation
Grantee:Jorge Henrique de Alvarenga Nogueira
Support type: Scholarships in Brazil - Doctorate (Direct)