RT Journal Article
T1 γ(∗) + 𝐍(𝟗𝟒𝟎)⁢𝟏/𝟐+ → 𝐍(𝟏𝟓𝟐𝟎)𝟑/𝟐− helicity amplitudes and transition form factors
A1 Albino, L.
A1 Paredes Torres, Gustavo
A1 Raya, Khépani
A1 Bashir, Adnan
A1 Segovia González, Jorge
AB We recently reported new results on the 𝛾(*)+𝑁⁡(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 𝛾(*)+𝑁⁡(940)⁢1/2+ →𝑁⁡(1520)⁢3/2− transition. Our computed transition form factors show reasonable agreement with experimental data at large photon virtualities. However, deviations emerge at low 𝑄2, 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.
PB American Physical Society
SN 2470-0010
SN 2470-0029 (electrónico)
YR 2025
FD 2025
LK https://hdl.handle.net/10272/27367
UL https://hdl.handle.net/10272/27367
LA eng
NO Albino, L., Paredes-Torres, G., Raya, K., Bashir, A., & Segovia, J. (2025). γ(∗) + 𝐍(𝟗𝟒𝟎)𝟏/𝟐+ → 𝐍(𝟏𝟓𝟐𝟎)𝟑/𝟐− helicity amplitudes and transition form factors. Physical Review D, 112(7). https://doi.org/10.1103/qpr2-nwtw
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026