Identification of Nuclear Effects in Neutrino-Carbon Interactions at Low Three-Momentum Transfer.

Abstract

Two different nuclear-medium effects are isolated using a low three-momentum transfer subsample of neutrino-carbon scattering data from the MINERvA neutrino experiment. The observed hadronic energy in charged-current ν_{μ} interactions is combined with muon kinematics to permit separation of the quasielastic and Δ(1232) resonance processes. First, we observe a small cross section at very low energy transfer that matches the expected screening effect of long-range nucleon correlations. Second, additions to the event rate in the kinematic region between the quasielastic and Δ resonance processes are needed to describe the data. The data in this kinematic region also have an enhanced population of multiproton final states. Contributions predicted for scattering from a nucleon pair have both properties; the model tested in this analysis is a significant improvement but does not fully describe the data. We present the results as a double-differential cross section to enable further investigation of nuclear models. Improved description of the effects of the nuclear environment are required by current and future neutrino oscillation experiments.

DOI: 10.1103/PhysRevLett.116.071802

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@article{Rodrigues2016IdentificationON, title={Identification of Nuclear Effects in Neutrino-Carbon Interactions at Low Three-Momentum Transfer.}, author={Pamela Araya Rodrigues and J Demgen and E Miltenberger and Lissette Aliaga and O. Altinok and Leo Bellantoni and A. Bercellie and Meyerling Betancourt and Arie Bodek and Alessandro Bravar and Howard S. Budd and T Cai and Maria Filomena Neves Carneiro and Jiř{\'i} Chvojka and Jijesh Devan and S . A . Dytman and G A D{\'i}az and Bardwell Eberly and Michael Elkins and Jennifer Felix and L. Fields and R. Fine and A . M . Gago and R. Escobar Galindo and Herbert Gallagher and Asimkumar Ghosh and T . Golan and Richard Gran and D . A . Harris and Anjarath Higuera and Kenyi Hurtado and M . Kiveni and J Kleykamp and Michael Kordosky and Tien Q Le and J R Leistico and A Lovlein and E Maher and S . Manly and W . Anthony Mann and Caroline M Marshall and D A Martinez Caicedo and Kevin S. McFarland and C . L . McGivern and A. M. McGowan and B Messerly and John Allen Miller and A. Mislivec and Jorge Morfin and Julien Mousseau and T Muhlbeier and D . Naples and Jenny Nelson and A Norrick and Nuruzzaman and Jyotsna Osta and V . Paolone and Carol E Patrick and Gabriel N. Perdue and Michelle A Ramirez and Ronald D. Ransome and Hasi Ray and L. P. Ren and Dipak Rimal and D . Ruterbories and H. Schellman and Darrel Schmitz and C J Solano Salinas and Nathaniel Tagg and B G Tice and Enric Valencia and Tera Walton and Joanne Wolcott and M Wospakrik and Genaro Zavala and D Zhang}, journal={Physical review letters}, year={2016}, volume={116 7}, pages={071802} }