Measurement of Muon Antineutrino Quasielastic Scattering on a Hydrocarbon Target at Eν3.5GeV

L. Fields et al. (MINERvA Collaboration)
Phys. Rev. Lett. 111, 022501 – Published 11 July 2013
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Abstract

We have isolated ν¯μ charged-current quasielastic (QE) interactions occurring in the segmented scintillator tracking region of the MINERvA detector running in the NuMI neutrino beam at Fermilab. We measure the flux-averaged differential cross section, dσ/dQ2, and compare to several theoretical models of QE scattering. Good agreement is obtained with a model where the nucleon axial mass, MA, is set to 0.99GeV/c2 but the nucleon vector form factors are modified to account for the observed enhancement, relative to the free nucleon case, of the cross section for the exchange of transversely polarized photons in electron-nucleus scattering. Our data at higher Q2 favor this interpretation over an alternative in which the axial mass is increased.

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  • Received 9 May 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.022501

© 2013 American Physical Society

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Measurement of Muon Neutrino Quasielastic Scattering on a Hydrocarbon Target at Eν3.5GeV

G. A. Fiorentini et al. (MINERvA Collaboration)
Phys. Rev. Lett. 111, 022502 (2013)

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Vol. 111, Iss. 2 — 12 July 2013

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