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Title: Emission of neutron–proton and proton–proton pairs in neutrino scattering

For this paper, we use a recently developed model of relativistic meson-exchange currents to compute the neutron–proton and proton–proton yields in (νμ, μ -)scattering from 12C in the 2p–2h channel. We compute the response functions and cross sections with the relativistic Fermi gas model for different 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. In the case of charge-changing neutrino scattering the 2p–2h cross section of proton–proton emission (i.e.,np in the initial state) is much larger than for neutron–proton emission (i.e.,two neutrons in the initial state) by a (ω, q)-dependent factor. 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 other effects including exchange contributions and the effect of the axial and vector currents.
Authors:
 [1] ; ORCiD logo [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [5]
  1. Univ. of Granada (Spain). Carlos I Inst. of Theoretical and Computational Physics and Dept. of Atomic Physics
  2. Univ. of Turin (Italy). Dept. of Physics; National Inst. of Nuclear Physics (INFN), Turin (Italy)
  3. National Inst. of Nuclear Physics (INFN), Turin (Italy)
  4. Univ. of Seville (Spain). Dept. of Atomic, Molecular and Nuclear Physics
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics, Lab. for Nuclear Science and Dept. of Physics
Publication Date:
Grant/Contract Number:
FC02-94ER40818; FIS2014-59386-P; FIS2014-53448-C2-1; FQM225; FQM160; IS-MANYBODY; IJCI-2014-20038; FQM7632
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 762; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE; General Directorate of Scientific and Technical Research (DGICT); European Regional Development Fund (ERDF); Agency for Innovation and Development of Andalusia (IDEA); National Inst. for Nuclear Physics (INFN); Ministry of Economy, Industry and Competitiveness (MINECO)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 43 PARTICLE ACCELERATORS
OSTI Identifier:
1325320
Alternate Identifier(s):
OSTI ID: 1427743

Ruiz Simo, I., Amaro, J. E., Barbaro, M. B., De Pace, A., Caballero, J. A., Megias, G. D., and Donnelly, T. W.. Emission of neutron–proton and proton–proton pairs in neutrino scattering. United States: N. p., Web. doi:10.1016/j.physletb.2016.09.021.
Ruiz Simo, I., Amaro, J. E., Barbaro, M. B., De Pace, A., Caballero, J. A., Megias, G. D., & Donnelly, T. W.. Emission of neutron–proton and proton–proton pairs in neutrino scattering. United States. doi:10.1016/j.physletb.2016.09.021.
Ruiz Simo, I., Amaro, J. E., Barbaro, M. B., De Pace, A., Caballero, J. A., Megias, G. D., and Donnelly, T. W.. 2016. "Emission of neutron–proton and proton–proton pairs in neutrino scattering". United States. doi:10.1016/j.physletb.2016.09.021.
@article{osti_1325320,
title = {Emission of neutron–proton and proton–proton pairs in neutrino scattering},
author = {Ruiz Simo, I. and Amaro, J. E. and Barbaro, M. B. and De Pace, A. and Caballero, J. A. and Megias, G. D. and Donnelly, T. W.},
abstractNote = {For this paper, we use a recently developed model of relativistic meson-exchange currents to compute the neutron–proton and proton–proton yields in (νμ, μ-)scattering from 12C in the 2p–2h channel. We compute the response functions and cross sections with the relativistic Fermi gas model for different 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. In the case of charge-changing neutrino scattering the 2p–2h cross section of proton–proton emission (i.e.,np in the initial state) is much larger than for neutron–proton emission (i.e.,two neutrons in the initial state) by a (ω, q)-dependent factor. 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 other effects including exchange contributions and the effect of the axial and vector currents.},
doi = {10.1016/j.physletb.2016.09.021},
journal = {Physics Letters. Section B},
number = C,
volume = 762,
place = {United States},
year = {2016},
month = {11}
}