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

Journal Article · Thu Nov 10 00:00:00 EST 2016 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2016.09.021· OSTI ID:1325320

Ruiz Simo, I. ^[1]; Amaro, J. E.  ^[1]; Barbaro, M. B. ^[2]; De Pace, A. ^[3]; Caballero, J. A. ^[4]; Megias, G. D. ^[4]; Donnelly, T. W. ^[5]

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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

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.

• Research Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
• Sponsoring Organization: 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)
• Grant/Contract Number: FC02-94ER40818; FIS2014-59386-P; FIS2014-53448-C2-1; FQM225; FQM160; IS-MANYBODY; IJCI-2014-20038; FQM7632
• OSTI ID: 1325320
• Alternate ID(s): OSTI ID: 1427743
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Vol. 762 Journal Issue: C; ISSN 0370-2693
• Publisher: Elsevier
• Country of Publication: Netherlands
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
43 PARTICLE ACCELERATORS