Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers
The effects of meson-exchange currents (MEC) are computed for the one-particle one-hole transverse response function for finite nuclei at high momentum transfers q in the region of the quasi-elastic peak. A semirelativistic shell model is used for the one-particle-emission (e,e') reaction. Re...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
|
| Online Access: | http://hdl.handle.net/1721.1/56260 https://orcid.org/0000-0002-3524-1432 |
| _version_ | 1811084185564086272 |
|---|---|
| author | Amaro, J. E. Barbaro, M. B. Caballero, J. A. Maieron, C. Udias, J. M. Donnelly, T. William |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Amaro, J. E. Barbaro, M. B. Caballero, J. A. Maieron, C. Udias, J. M. Donnelly, T. William |
| author_sort | Amaro, J. E. |
| collection | MIT |
| description | The effects of meson-exchange currents (MEC) are computed for the one-particle one-hole transverse response function for finite nuclei at high momentum transfers q in the region of the quasi-elastic peak. A semirelativistic shell model is used for the one-particle-emission (e,e') reaction. Relativistic effects are included using relativistic kinematics, performing a semirelativistic expansion of the current operators, and using the Dirac-equation-based (DEB) form of the relativistic mean-field potential for the final states. It is found that final-state interactions (FSI) produce an important enhancement of the MEC in the high-energy tail of the response function for q≥1 GeV/c. The combined effect of MEC and FSI goes away when other models of the FSI, not based on the DEB potential, are employed. |
| first_indexed | 2024-09-23T12:46:43Z |
| format | Article |
| id | mit-1721.1/56260 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:46:43Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/562602022-09-28T09:57:59Z Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers Amaro, J. E. Barbaro, M. B. Caballero, J. A. Maieron, C. Udias, J. M. Donnelly, T. William Massachusetts Institute of Technology. Center for Theoretical Physics Donnelly, T. William Donnelly, T. William The effects of meson-exchange currents (MEC) are computed for the one-particle one-hole transverse response function for finite nuclei at high momentum transfers q in the region of the quasi-elastic peak. A semirelativistic shell model is used for the one-particle-emission (e,e') reaction. Relativistic effects are included using relativistic kinematics, performing a semirelativistic expansion of the current operators, and using the Dirac-equation-based (DEB) form of the relativistic mean-field potential for the final states. It is found that final-state interactions (FSI) produce an important enhancement of the MEC in the high-energy tail of the response function for q≥1 GeV/c. The combined effect of MEC and FSI goes away when other models of the FSI, not based on the DEB potential, are employed. DGI (Spain) (Grant Nos. FIS2008-01143, FPA2006-13807-C02-01, FIS2008- 04189, and FPA2007-62216) Junta de Andalucía INFN-MEC (Spain) Spanish Consolider-Ingenio 2000 Program CPAN (CSD2007-00042) 2010-07-12T17:18:08Z 2010-07-12T17:18:08Z 2010-01 2009-06 Article http://purl.org/eprint/type/JournalArticle 0556-2813 http://hdl.handle.net/1721.1/56260 Amaro, J. E. et al. “Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers.” Physical Review C 81.1 (2010): 014606. © 2010 The American Physical Society https://orcid.org/0000-0002-3524-1432 en_US http://dx.doi.org/10.1103/PhysRevC.81.014606 Physical Review C Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Amaro, J. E. Barbaro, M. B. Caballero, J. A. Maieron, C. Udias, J. M. Donnelly, T. William Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers |
| title | Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers |
| title_full | Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers |
| title_fullStr | Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers |
| title_full_unstemmed | Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers |
| title_short | Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers |
| title_sort | meson exchange currents and final state interactions in quasielastic electron scattering at high momentum transfers |
| url | http://hdl.handle.net/1721.1/56260 https://orcid.org/0000-0002-3524-1432 |
| work_keys_str_mv | AT amaroje mesonexchangecurrentsandfinalstateinteractionsinquasielasticelectronscatteringathighmomentumtransfers AT barbaromb mesonexchangecurrentsandfinalstateinteractionsinquasielasticelectronscatteringathighmomentumtransfers AT caballeroja mesonexchangecurrentsandfinalstateinteractionsinquasielasticelectronscatteringathighmomentumtransfers AT maieronc mesonexchangecurrentsandfinalstateinteractionsinquasielasticelectronscatteringathighmomentumtransfers AT udiasjm mesonexchangecurrentsandfinalstateinteractionsinquasielasticelectronscatteringathighmomentumtransfers AT donnellytwilliam mesonexchangecurrentsandfinalstateinteractionsinquasielasticelectronscatteringathighmomentumtransfers |