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Item type:Publication, Probing nuclear effects with neutrino-induced charged-current neutral pion production(American Physical Society, 2020-10-19)We study neutrino-induced charged-current (CC) ${\ensuremath{\pi}}^{0}$ production on carbon nuclei using events with fully imaged final-state proton-${\ensuremath{\pi}}^{0}$ systems. Novel use of final-state correlations based on transverse kinematic imbalance enables the first measurements of the struck nucleon's Fermi motion, of the intranuclear momentum transfer (IMT) dynamics, and of the final-state hadronic momentum configuration in neutrino pion production. Event distributions are presented for (i) the momenta of neutrino-struck neutrons below the Fermi surface, (ii) the direction of missing transverse momentum characterizing the strength of IMT, and (iii) proton-pion momentum imbalance with respect to the lepton scattering plane. The observed Fermi motion and IMT strength are compared to the previous $\mathrm{MINER}\ensuremath{\nu}\mathrm{A}$ measurement of neutrino CC quasielastic-like production. The measured shapes and absolute rates of these distributions, as well as the cross section asymmetries, show tensions with predictions from current neutrino generator models. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Nucleon binding energy and transverse momentum imbalance in neutrino-nucleus reactions(American Physical Society, 2020-05-01)We have measured new observables based on the final state kinematic imbalances in the mesonless production of ${\ensuremath{\nu}}_{\ensuremath{\mu}}+A\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}+p+X$ in the MINER\ensuremath{\nu}A tracker. Components of the muon-proton momentum imbalances parallel ($\ensuremath{\delta}{p}_{\mathrm{Ty}}$) and perpendicular ($\ensuremath{\delta}{p}_{\mathrm{Tx}}$) to the momentum transfer in the transverse plane are found to be sensitive to the nuclear effects such as Fermi motion, binding energy, and non-quasielastic (QE) contributions. The QE peak location in $\ensuremath{\delta}{p}_{\mathrm{Ty}}$ is particularly sensitive to the binding energy. Differential cross sections are compared to predictions from different neutrino interaction models. The Fermi gas models presented in this study cannot simultaneously describe features such as QE peak location, width, and the non-QE events contributing to the signal process. Correcting the genie's binding energy implementation according to theory causes better agreement with data. Hints of proton left-right asymmetry are observed in $\ensuremath{\delta}{p}_{\mathrm{Tx}}$. Better modeling of the binding energy can reduce the bias in neutrino energy reconstruction, and these observables can be applied in current and future experiments to better constrain nuclear effects.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, High-Statistics Measurement of Neutrino Quasielasticlike Scattering at 6 GeV on a Hydrocarbon Target(American Physical Society, 2020-03-27)We measure neutrino charged-current quasielasticlike scattering on hydrocarbon at high statistics using the wideband Neutrinos at the Main Injector beam with neutrino energy peaked at 6 GeV. The double-differential cross section is reported in terms of muon longitudinal (p_{∥}) and transverse (p_{⊥}) momentum. Cross section contours versus lepton momentum components are approximately described by a conventional generator-based simulation, however, discrepancies are observed for transverse momenta above 0.5 GeV/c for longitudinal momentum ranges 3-5 and 9-20 GeV/c. The single differential cross section versus momentum transfer squared (dσ/dQ_{QE}^{2}) is measured over a four-decade range of Q^{2} that extends to 10 GeV^{2}. The cross section turnover and falloff in the Q^{2} range 0.3-10 GeV^{2} is not fully reproduced by generator predictions that rely on dipole form factors. Our measurement probes the axial-vector content of the hadronic current and complements the electromagnetic form factor data obtained using electron-nucleon elastic scattering. These results help oscillation experiments because they probe the importance of various correlations and final-state interaction effects within the nucleus, which have different effects on the visible energy in detectors. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Constraining the NuMI neutrino flux using inverse muon decay reactions in MINERvA(American Physical Society, 2021-11-01)Inverse muon decay, ${\ensuremath{\nu}}_{\ensuremath{\mu}}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\nu}}_{e}$, is a reaction whose cross section can be predicted with very small uncertainties. It has a neutrino energy threshold of $\ensuremath{\approx}11\text{ }\text{ }\mathrm{GeV}$ and can be used to constrain the high-energy part of the flux in the NuMI neutrino beam. This reaction is the dominant source of events which only contain high-energy muons nearly parallel to the direction of the neutrino beam. We have isolated a sample of hundreds of such events in neutrino and antineutrino enhanced beams, and have constrained the predicted high-energy flux.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simultaneous measurement of proton and lepton kinematics in quasielasticlike ??-hydrocarbon interactions from 2 to 20 GeV(American Physical Society, 2022-07-08)Neutrino charged-current quasielastic-like scattering, a reaction category extensively used in neutrino oscillation measurements, probes nuclear effects that govern neutrino-nucleus interactions. This Letter reports the first measurement of the triple-differential cross section for ν_{μ} quasielastic-like reactions using the hydrocarbon medium of the MINERvA detector exposed to a wideband beam spanning 2≤E_{ν}≤20 GeV. The measurement maps the correlations among transverse and longitudinal muon momenta and summed proton kinetic energies, and compares them to predictions from a state-of-art simulation. Discrepancies are observed that likely reflect shortfalls with modeling of pion and nucleon intranuclear scattering and/or spectator nucleon ejection from struck nuclei. The separate determination of leptonic and hadronic variables can inform experimental approaches to neutrino-energy estimation.1