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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.)

Color-suppression of non-planar diagrams in bosonic bound states

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Alvarenga Nogueira, J. H. [1, 2] ; Ji, Chueng-Ryong [3] ; Ydrefors, E. [1] ; Frederico, T. [1]
Total Authors: 4
[1] DCTA, Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos - Brazil
[2] Univ Roma La Sapienza, Ist Nazl Fis Nucl, Dipartimento Fis, Sez Roma, Piazzale A Moro 5, I-00187 Rome - Italy
[3] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 - USA
Total Affiliations: 3
Document type: Journal article
Source: Physics Letters B; v. 777, p. 207-211, FEB 10 2018.
Web of Science Citations: 2

We study the suppression of non-planar diagrams in a scalar QCD model of a meson system in 3 + 1 space-time dimensions due to the inclusion of the color degrees of freedom. As a prototype of the color-singlet meson, we consider a flavor-nonsinglet system consisting of a scalar-quark and a scalar-antiquark with equal masses exchanging a scalar-gluon of a different mass, which is investigated within the framework of the homogeneous Bethe-Salpeter equation. The equation is solved by using the Nakanishi representation for the manifestly covariant bound-state amplitude and its light-front projection. The resulting non-singular integral equation is solved numerically. The damping of the impact of the cross-ladder kernel on the binding energies are studied in detail. The color-suppression of the cross-ladder effects on the light-front wave function and the elastic electromagnetic form factor are also discussed. As our results show, the suppression appears significantly large for N-c = 3, which supports the use of rainbow-ladder truncations in practical non-perturbative calculations within QCD. (c) 2017 The Authors. Published by Elsevier B.V. (AU)

FAPESP's process: 17/14695-1 - Exploring the hadron structure through the Bethe-Salpeter Equation in Minkowski space
Grantee:Jorge Henrique de Alvarenga Nogueira
Support type: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 17/05660-0 - Theoretical studies of the structure and reactions of exotic nuclei and many-body systems
Grantee:Brett Vern Carlson
Support type: Research Projects - Thematic Grants
FAPESP's process: 16/25143-7 - Relativistic two and three-body problems in Minkowski space in (2+1) and (3+1) dimensions
Grantee:Emanuel Arthur Ydrefors
Support type: Scholarships in Brazil - Post-Doctorate
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)