$N^* (1520)$ transition form factors from dispersion theory
Author:
Di An
Keyword:
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph)
journal:
--
date:
2023-09-26 16:00:00
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 $N^{*}(1520)\to N$ at low energies is presented. Taking pion rescattering into consideration, we derived dispersive relations for the $N^{*}(1520)\to N$ 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).PDF: $N^* (1520)$ transition form factors from dispersion theory.pdf
