Year: 2013
Type: article
Abstract: The ${\ensuremath{\gamma}}^{*}N\ensuremath{\rightarrow}\ensuremath{\Delta}(1232)$ transition is a window onto hadron shape deformation, the applicability of perturbative QCD at moderate momentum transfers, and the influence of nonperturbative phenomena on hadronic observables. We explain that the Ash-convention magnetic transition form factor must fall faster than the neutron's magnetic form factor and that nonzero values for the associated quadrupole ratios reveal the impact of quark orbital angular momentum within the nucleon and $\ensuremath{\Delta}(1232)$; and we show that these quadrupole ratios do approach their predicted asymptotic limits, albeit slowly.
Source: Physical Review C
Authors: Jorge Segovia, Chen Chen, Craig D. Roberts, Shaolong Wan
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1554871135