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Experimental High Energy Physics

Publications

Measurement of Muon Antineutrino Quasi-Elastic Scattering on a Hydrocarbon Target at Eν∼3.5 GeV

Publicaciones

Measurement of Muon Antineutrino Quasi-Elastic Scattering on a Hydrocarbon Target at Eν∼3.5 GeV

Research areas:

Física Experimental de Alta Energía

Year:

2013

Type of Publication:

In Proceeding

Authors:

Journal:

Phys. Rev. Lett

Volume:

111

Pages:

8

 

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, d{\sigma}/dQ^2, 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/c^2 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 Q^2 favor this interpretation over an alternative in which the axial mass is increased.

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