γ(∗) + ()/+ → ()/− helicity amplitudes and transition form factors
We recently reported new results on the (*)+(940)1/2+→Δ(1700) 3/2− transition form factors using a symmetry-preserving treatment of a vector ⊗vector contact interaction (SCI) within a coupled formalism based on the Dyson-Schwinger, Bethe-Salpeter, and Faddeev equations. In this work, we extend o...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/27367 |
| Acceso en línea: | https://hdl.handle.net/10272/27367 |
| Access Level: | acceso abierto |
| Palabra clave: | 2208.07 Física de Partículas 2212 Física Teórica |
| Sumario: | We recently reported new results on the (*)+(940)1/2+→Δ(1700) 3/2− transition form factors using a symmetry-preserving treatment of a vector ⊗vector contact interaction (SCI) within a coupled formalism based on the Dyson-Schwinger, Bethe-Salpeter, and Faddeev equations. In this work, we extend our investigation to the (*)+(940)1/2+ →(1520)3/2− transition. Our computed transition form factors show reasonable agreement with experimental data at large photon virtualities. However, deviations emerge at low 2, where experimental results exhibit a sharper variation than theoretical predictions. This discrepancy is expected, as these continuum QCD analyses account only for the quark-core of baryons, while low photon virtualities are dominated by meson cloud effects. We anticipate that these analytical predictions, based on the simplified SCI framework, will serve as a valuable benchmark for more refined studies and QCD-based truncations that incorporate quark angular momentum and the contributions of scalar and vector diquarks. |
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