Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents
|Author||Ruiz Simo, I.
Amaro Soriano, José Enrique
Barbaro, M. B.
Pace, Arturo de
Caballero Carretero, Juan Antonio
Megías Vázquez, Guillermo Daniel
Donnelly, T. W.
|Department||Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear|
|Published in||Physical Review C - Nuclear Physics, 94, 054610-1-054610-4.|
|Abstract||We use a relativistic model of meson-exchange currents to compute the proton-neutron and proton-proton yields in (e,e ) scattering from 12C 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 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.|
|Cite||Ruiz Simó, I.L., Amaro Soriano, J.E., Barbaro, M.B., Pace, A.d., Caballero Carretero, J.A., Megías Vázquez, G.D. y Donnelly, T.W. (2016). Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents. Physical Review C - Nuclear Physics, 94, 054610-1-054610-4.|