Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents
We use a relativistic model of meson-exchange currents to compute the proton-neutron and proton-proton yields in (e,e′) scattering from [superscript 12]C in the 2p-2h channel. We compute the response functions and cross section with the relativistic Fermi gas model for a range of kinematics from int...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/107896 https://orcid.org/0000-0002-3524-1432 |
| _version_ | 1826207882623844352 |
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| author | Simo, I. Ruiz Amaro, J. E. Barbaro, M. B. De Pace, A. Caballero, J. A. Megias, G. D. Donnelly, T William |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Simo, I. Ruiz Amaro, J. E. Barbaro, M. B. De Pace, A. Caballero, J. A. Megias, G. D. Donnelly, T William |
| author_sort | Simo, I. Ruiz |
| collection | MIT |
| description | We use a relativistic model of meson-exchange currents to compute the proton-neutron and proton-proton yields in (e,e′) scattering from [superscript 12]C in the 2p-2h channel. We compute the response functions and cross section with the relativistic Fermi gas model for a range of kinematics from intermediate- to high-momentum transfers. We find a large contribution of neutron-proton configurations in the initial state, as compared to proton-proton pairs. The different emission probabilities of distinct species of nucleon pairs are produced in our model only by meson-exchange currents, mainly by the Δ isobar current. We also analyze the effect of the exchange contribution and show that the direct-exchange interference strongly affects the determination of the np/pp ratio. |
| first_indexed | 2024-09-23T13:56:27Z |
| format | Article |
| id | mit-1721.1/107896 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:56:27Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1078962022-10-01T18:07:54Z Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents Simo, I. Ruiz Amaro, J. E. Barbaro, M. B. De Pace, A. Caballero, J. A. Megias, G. D. Donnelly, T William Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Donnelly, T William We use a relativistic model of meson-exchange currents to compute the proton-neutron and proton-proton yields in (e,e′) scattering from [superscript 12]C in the 2p-2h channel. We compute the response functions and cross section with the relativistic Fermi gas model for a range of kinematics from intermediate- to high-momentum transfers. We find a large contribution of neutron-proton configurations in the initial state, as compared to proton-proton pairs. The different emission probabilities of distinct species of nucleon pairs are produced in our model only by meson-exchange currents, mainly by the Δ isobar current. We also analyze the effect of the exchange contribution and show that the direct-exchange interference strongly affects the determination of the np/pp ratio. Spain. Dirección General de Investigación Científica y Técnica Fonds Europeen de Developpement Economique et Regional (Grants FIS2014-59386-P and FIS2014-53448-C2-1) Agencia de Innovacion y Desarrollo de Andalucia (Grants FQM225 and FQM160) Istituto nazionale di fisica nucleare (INFN) (Project MANYBODY) United States. Dept. of Energy (Cooperative Agreement DE-FC02-94ER40818) 2017-04-06T15:16:20Z 2017-04-06T15:16:20Z 2016-11 2016-06 2016-11-08T23:00:04Z Article http://purl.org/eprint/type/JournalArticle 2469-9985 2469-9993 http://hdl.handle.net/1721.1/107896 Simo, I. Ruiz et al. “Emission of Neutron-Proton and Proton-Proton Pairs in Electron Scattering Induced by Meson-Exchange Currents.” Physical Review C 94.5 (2016): n. pag. © 2016 American Physical Society https://orcid.org/0000-0002-3524-1432 en http://dx.doi.org/10.1103/PhysRevC.94.054610 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. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Simo, I. Ruiz Amaro, J. E. Barbaro, M. B. De Pace, A. Caballero, J. A. Megias, G. D. Donnelly, T William Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents |
| title | Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents |
| title_full | Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents |
| title_fullStr | Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents |
| title_full_unstemmed | Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents |
| title_short | Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents |
| title_sort | emission of neutron proton and proton proton pairs in electron scattering induced by meson exchange currents |
| url | http://hdl.handle.net/1721.1/107896 https://orcid.org/0000-0002-3524-1432 |
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