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26 April 2024

» arxiv » 1511.5944

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Identification of nuclear effects in neutrino-carbon interactions at low three-momentum transfer
P.A. Rodrigues ; J. Demgen ; E. Miltenberger ; L. Aliaga ; O. Altinok ; A. Bercellie ; M. Betancourt ; A. Bodek ; A. Bravar ; M.F. Carneiro ; J. Chvojka ; J. Devan ; B. Eberly ; M. Elkins ; J. Felix ; L. Fields ; R. Fine ; A.M. Gago ; R. Galindo ; H. Gallagher ; A. Ghosh ; T. Golan ; R. Gran ; D.A. Harris ; A. Higuera ; K. Hurtado ; M. Kiveni ; J. Kleykamp ; M. Kordosky ; T. Le ; J.R. Leistico ; A. Lovlein ; E. Maher ; S. Manly ; W.A. Mann ; C.M. Marshall ; D.A. Martinez Caicedo ; K.S. McFarland ; C.L. McGivern ; A.M. McGowan ; B. Messerly ; J. Miller ; A. Mislivec ; J. Mousseau ; T. Muhlbeier ; D. Naples ; J.K. Nelson ; A. Norrick ; Nuruzzaman ; C.E. Patrick ; G.N. Perdue ; M.A. Ramirez ; R.D. Ransome ; H. Ray ; L. Ren ; D. Rimal ; D. Ruterbories ; D.W. Schmitz ; C.J. Solano Salinas ; B.G. Tice ; E. Valencia ; T. Walton ; J. Wolcott ; M. Wospakrik ; G. Zavala ; D. Zhang ;
Date:	18 Nov 2015
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 $ u_mu$ interactions is combined with muon kinematics to permit separation of the quasielastic and $Delta$(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 $Delta$ resonance processes are needed to describe the data. The data in this kinematic region also has an enhanced population of multi-proton 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.
Source:	arXiv, 1511.5944
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