MINERvA · 2013

Measurement of Muon Antineutrino Quasielastic Scattering on a Hydrocarbon Target at Eν∼3.5 GeV

Phys.Rev.Lett. 111 022501 · 10.1103/PhysRevLett.111.022501

arXiv:1305.2234 Journal INSPIRE All papers

Measurements

Current	Flavor	Target	Topology	Type	Observables	Energy
CC	ν̄μ	CH	CCQE	single-diff	differential cross section vs Q2	—

Abstract

We have isolated muon anti-neutrino charged-current quasi-elastic 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 quasi-elastic scattering. Good agreement is obtained with a model where the nucleon axial mass, M_A, is set to 0.99 GeV/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.

Citation

@article{MINERvA:2013bcy,
    author = "Fields, L. and others",
    collaboration = "MINERvA",
    title = "{Measurement of Muon Antineutrino Quasielastic Scattering on a Hydrocarbon Target at E\ensuremath{\nu}\ensuremath{\sim}3.5  GeV}",
    eprint = "1305.2234",
    archivePrefix = "arXiv",
    primaryClass = "hep-ex",
    reportNumber = "FERMILAB-PUB-13-147-E",
    doi = "10.1103/PhysRevLett.111.022501",
    journal = "Phys. Rev. Lett.",
    volume = "111",
    number = "2",
    pages = "022501",
    year = "2013"
}