γ^∗ N → N^∗ (1520) transition form factors in light cone QCD

2014/09/18 by T. M. Aliev, Aliev, T. M., M. Savcı +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1409.5250

openalex publication_date 2014/09/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The γ^∗ N → N^∗ (1520) reaction is studied in framework of the light cone QCD sum rules method. The sum rules for the multipole form factors, namely, for the magnetic dipole G_M(Q²), electric quadrupole G_E(Q²), and Coulomb quadrupole G_C(Q²), form factors responsible for for the γ^∗ N → N^∗ (1520) transition are derived. Using these sum rules, the helicity amplitudes are presented as the combinations of these multipole form factors, and their Q² dependences are studied. We compare our results on the helicity amplitudes with those of the spectator model predictions, and with the existing experimental data.

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