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
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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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