Medium modifications of the neutron charge form factor
Ulf-G. MeißnerCenter for Theoretical Physics, Laboratory for Nuclear Science Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
1989en
ABI
Abstract
We discuss the behavior of the neutron charge form factor in a nuclear environment using the framework of a chiral \ensuremath{\pi}\ensuremath{\rho}\ensuremath{\omega} Lagrangian. For momentum transfers of 0.4 (GeV/c${)}^{2}$ and larger, the medium renormalization of fundamental meson parameters leads to a sizable decrease in the neutron charge form factor. This effect might be seen in an upcoming high-precision experiment to determine the electric form factor of the neutron through scattering of polarized electrons from polarized $^{3}\mathrm{He}$. We also find that the effective nucleon mass and axial-vector coupling constant ${g}_{A}$ are quenched.
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Cited by 20 references