| Full text | |
| Author(s): |
Ydrefors, E.
[1]
;
de Paula, W.
[1]
;
Alvarenga Nogueira, J. H.
[1, 2, 3]
;
Frederico, T.
[1]
;
Salme, G.
[2]
Total Authors: 5
|
| Affiliation: | [1] Inst Tecnol Aeronaut, DCTA, BR-12228900 Sao Jose Dos Campos - Brazil
[2] Ist Nazl Fis Nucl, Sez Roma, Piazzale A Moro 2, I-00185 Rome - Italy
[3] Rome Univ La Sapienza, Phys Dept, Piazzale A Moro 2, I-00185 Rome - Italy
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Physics Letters B; v. 820, SEP 10 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The pion electromagnetic form factor has been calculated for the first time from the solutions of the Bethe-Salpeter equation, obtained directly in Minkowski space by using the Nakanishi integral representation of the Bethe-Salpeter amplitude. The one-gluon exchange kernel contains as inputs the quark and gluon masses, as well as a scale parameter featuring the extended quark-gluon vertex. The range of variability of these parameters is suggested by lattice calculations. After presenting a very successful comparison with the existing data in the whole range of the momentum transfer, we show how inserting the light-front (LF) formalism in our approach allows to achieve further interesting results, like the evaluation of the LF valence form factor and a first investigation of the end-points effects. (C) 2021 Published by Elsevier B.V. (AU) | |
| FAPESP's process: | 13/26258-4 - Superdense matter in the universe |
| Grantee: | Manuel Máximo Bastos Malheiro de Oliveira |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/21758-2 - Relativistic few-body problems and antiproton reactions |
| Grantee: | Emanuel Arthur Ydrefors |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |
| 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 Opportunities: | 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 Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 14/19094-8 - Three-body heavy meson decay and CP violation |
| Grantee: | Jorge Henrique de Alvarenga Nogueira |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |