N^* (1520) transition form factors from dispersion theory

2023/09/27 by An, Di
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2309.15992

Abstract

The electromagnetic transition form factors (TFFs) of the nucleon provide important information on the internal structure of hadrons. A model-independent dispersive calculation of the electromagnetic TFFs N^*(1520)→ N at low energies is presented. Taking pion rescattering into consideration, we derived dispersive relations for the N^*(1520)→ N TFFs that relate space-like and time-like regions from the first principles. Based on the space-like data from JLab and hadronic data measured by HADES, we make predictions for TFFs in the time-like region. Our predictions can be tested in future experiments (e.g. HADES).

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