Relativistic pionic effects in quasielastic electron scattering
May, 2001
44 pages
Published in:
- Nucl.Phys.A 697 (2002) 388-428
e-Print:
- nucl-th/0106035 [nucl-th]
Report number:
- MIT-CTP-3127
Citations per year
Abstract:
The impact of relativistic pionic correlations and meson-exchange currents on the response functions for electromagnetic quasielastic electron scattering from nuclei is studied in detail. Results in first-order perturbation theory are obtained for one-particle emission electronuclear reactions within the context of the relativistic Fermi gas model. Improving upon previous analyses where non-relativistic reductions of the currents were performed, here a fully relativistic analysis in which both forces and currents are treated consistently is presented. Lorentz covariance is shown to play a crucial role in enforcing the gauge invariance of the theory. Effects stemming uniquely from relativity in the pionic correlations are identified and, in particular, a comprehensive study of the self-energy contributions and of the currents associated with the pion is presented. First- and second-kind scaling for high momentum transfer is investigated.Note:
- 43 pages, 21 figures Report-no: MIT/CTP 3127
- 25.30.Rw
- 14.20.Gk
- 24.10.Jv
- 24.30.Gd
- 13.40.Gp
- Nuclear reactions
- Inclusive electron scattering
- Pionic correlations
- Meson-exchange currents
- Relativistic Fermi gas
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