arXiv:hep-ph/0104203·v1·High Energy Physics — Phenomenology
Moments of the neutron charge form factor and the N->Delta quadrupole transition
P. Grabmayr🇩🇪 · A. J. Buchmann (Physikalisches Institut, University of Tuebingen, Germany)🇩🇪
Abstract
Recent data allow a new parametrization of the neutron charge form factor G_En. A parameter-free quark model relation between G_En and the N->Delta quadrupole form factor is used to predict the latter from the G_En data. In particular, the neutron charge radius is related to N->Delta quadrupole moment, while the fourth moment of G_En connects to the N->Delta quadrupole transition radius. From the latter we derive an experimental value for the charge radius of the light constituent quarks. Finally, the C2/M1 ratio in pion electroproduction is predicted from the elastic neutron form factor data.
Comments: 6 pages, 3 figures