Publisher’s Note: Identification of Nuclear Effects in Neutrino-Carbon Interactions at Low Three-Momentum Transfer [Phys. Rev. Lett. 
<b>116</b>
, 071802 (2016)]

In neutrino-nucleus interactions, a proton produced with a correlated pion might exhibit a leftright asymmetry relative to the lepton scattering plane even when the pion is absorbed. Absent in other proton production mechanisms, such an asymmetry measured in charged-current pionless production could reveal the details of the absorbed-pion events that are otherwise inaccessible. In this study, we demonstrate the idea of using final-state proton left-right asymmetries to quantify the absorbed-pion event fraction and underlying kinematics. This technique might provide critical information that helps constrain all underlying channels in neutrino-nucleus interactions in the GeV regime.

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

Pion-proton correlation in neutrino interactions on nuclei

Cai

Ruterbories

2019

“…Additional details concerning GENIE modeling of CC(π) channels are given in MINERvA publications [11][12][13]. Recent developments in neutrino phenomenology motivate certain augmentations to GENIE that are implemented via event reweighting and by adding a simulated sample of quasielastic-like 2-particle 2-hole (2p2h) events [44]. The refinements (described below) are very similar to those used in the reference simulations of recent, published MINERvA measurements [8,13,42,[45][46][47][48][49].…”

Section: B Neutrino Interaction Modelingmentioning

confidence: 99%

Measurement of ν¯μ charged-current single π− production on hydrocarbon in the few-GeV region using MINERvA

Le¹,

Cai²,

Sultana³

et al. 2019

Self Cite

The antineutrino scattering channelνµ CH → µ + π − X(nucleon(s)) is analyzed in the incident energy range 1.5 to 10 GeV using the MINERvA detector at Fermilab. Differential cross sections are reported as functions of µ + momentum and production angle, π − kinetic energy and production angle, and antineutrino energy and squared four-momentum transfer. Distribution shapes are generally reproduced by simulations based on the GENIE, NuWro, and GiBUU event generators, however GENIE (GiBUU) overestimates (underestimates) the cross-section normalizations by 8% (10%). Comparisons of data with the GENIE-based reference simulation probe conventional treatments of cross sections and pion intranuclear rescattering. The distribution of non-track vertex energy is used to decompose the signal sample into reaction categories, and cross sections are determined for the exclusive reactions µ + π − n and µ + π − p. A similar treatment applied to the published MINERvA sampleνµ CH → µ + π 0 X(nucleon(s)) has determined the µ + π 0 n cross section, and the latter is used with σ(π − n) and σ(π − p) to carry out an isospin decomposition ofνµ-induced CC(π). The ratio of magnitudes and relative phase for isospin amplitudes A3 and A1 thereby obtained are: Rν = 0.99 ± 0.19 and φν = 93 • ± 7 • . Our results are in agreement with bubble chamber measurements made four decades ago.

“…This clearly illustrates a general point: for the purpose of testing the physics models in the generators, detailed measurements of multiply differential cross sections are essential. Fortunately, many such measurements are already available from MiniBooNE [15], MIN-ERvA [16][17][18][19][20], MicroBooNE [21], and T2K [22,23], and more can be expected in the future (exploring various semi-inclusive modes). These data, when combined with the electron-scattering measurements described here, will provide a very powerful foundation for generator development.…”

Section: Inclusive Measurementsmentioning

confidence: 99%

“…In reality, while better neutrino data would certainly be desirable, it is unlikely to be sufficient. To date, neutrino experiments only have access to broadband beams, extract flux-integrated cross sections [15][16][17][18][19][20][21][22][23], and neutrino energy reconstruction itself suffers from sizable uncertainties. In turn, the process of energy reconstruction relies on neutrino generators.…”

Section: Introductionmentioning

confidence: 99%

Lepton-nucleus cross section measurements for DUNE with the LDMX detector

Ankowski

Friedland

et al. 2020

We point out that the LDMX (Light Dark Matter eXperiment) detector design, conceived to search for sub-GeV dark matter, will also have very advantageous characteristics to pursue electron-nucleus scattering measurements of direct relevance to the neutrino program at DUNE and elsewhere. These characteristics include a 4-GeV electron beam, a precision tracker, electromagnetic and hadronic calorimeters with near 2π azimuthal acceptance from the forward beam axis out to ∼40 • angle, and low reconstruction energy threshold. LDMX thus could provide (semi)exclusive cross-section measurements, with detailed information about final-state electrons, pions, protons, and neutrons. We compare the predictions of two widely-used neutrino generators (genie, gibuu) in the LDMX region of acceptance to illustrate the large modeling discrepancies in electron-nucleus interactions at DUNE-like kinematics. We argue that discriminating between these predictions is well within the capabilities of the LDMX detector.