(Formula presented) helicity amplitudes and transition form factors
Albino L.
Paredes-Torres G.
Raya K.
Bashir A.
Segovia J.
Physical Review D
Doi 10.1103/qpr2-nwtw
Volumen 112
páginas 1 - 11
2025-10-14
Citas: 1
© Published by the American Physical SocietyWe recently reported new results on the (Formula presented) ? 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 (Formula presented) 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.
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