Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents
Name
PhysRevC.94.054610.pdf
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275.27 KB
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Author(s)
Simo, I. Ruiz
Amaro, J. E.
Barbaro, M. B.
De Pace, A.
Caballero, J. A.
Megias, G. D.
Donnelly, T William
Date Issued
November 2016
Journal
Physical Review C
Publisher
American Physical Society
Citation
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
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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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.
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.94.054610
