Pionic correlations and meson-exchange currents in two-particle emission induced by electron scattering

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.044601· OSTI ID:21419611

Amaro, J E; Maieron, C ^[1]; Barbaro, M B ^[2]; Caballero, J A ^[3]; Donnelly, T W ^[4]

---

1. Departamento de Fisica Atomica, Molecular y Nuclear, Universidad de Granada, E-Granada 18071 (Spain)
2. Dipartimento di Fisica Teorica, Universita di Torino and Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Via P. Giuria 1, I-10125 Torino (Italy)
3. Departamento de Fisica Atomica, Molecular y Nuclear, Universidad de Sevilla, Apdo. 1065, E-41080 Sevilla (Spain)
4. Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Two-particle two-hole contributions to electromagnetic response functions are computed in a fully relativistic Fermi gas model. All one-pion exchange diagrams that contribute to the scattering amplitude in perturbation theory are considered, including terms for pionic correlations and meson-exchange currents (MECs). The pionic correlation terms diverge in an infinite system and thus are regularized by modification of the nucleon propagator in the medium to take into account the finite size of the nucleus. The pionic correlation contributions are found to be of the same order of magnitude as the MECs.

• OSTI ID: 21419611
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevC.82.044601; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSON-EXCHANGE MODELS
CORRELATIONS
ELECTRONS
EMISSION
FERMI GAS MODEL
NUCLEI
NUCLEONS
PERTURBATION THEORY
PIONS
RELATIVISTIC RANGE
RESPONSE FUNCTIONS
SCATTERING
SCATTERING AMPLITUDES
AMPLITUDES
BARYONS
BOSONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FUNCTIONS
HADRONS
LEPTONS
MATHEMATICAL MODELS
MESONS
NUCLEAR MODELS
PARTICLE MODELS
PERIPHERAL MODELS
PSEUDOSCALAR MESONS