Parity Violating Elastic Electron Scattering and Coulomb Distortions

Details Parity Violating Elastic Electron Scattering and Coulomb Distortions Parity Violating Elastic Electron Scattering and Coulomb Distortions

1998-01-08

arxiv.org/abs/nucl-th/9801011v2

Phys.Rev.C57:3430-3436,1998

Physics

Nuclear Physics

Nuclear Theory

22 pages, 14 ps figures, Revtex using psfig. Corrections of minor typos in figures

Scientific paper

10.1103/PhysRevC.57.3430

Parity violating elastic electron-nucleus scattering provides an accurate and model independent measurement of neutron densities, because the $Z^0$ couples primarily to neutrons. Coulomb distortion corrections to the parity violating asymmetry $A_l$ are calculated exactly using a relativistic optical model. Distortions significantly reduce $A_l$ in a heavy nucleus. However even with distortions, an experiment to measure the neutron radius is feasible. This will aid the interpretation of future atomic parity violation measurements and provide fundamental nuclear structure information. Coulomb distortions and small differences between neutron and proton radii could be important for a standard model test on $^4$He, $^{12}$C or $^{16}$O.

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