3. Producción
Browse
14 results
Search Results
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, Exploring neutrino–nucleus interactions in the GeV regime using MINERvA(Springer Science and Business Media Deutschland GmbH, 2021-12-01)With the advance of particle accelerator and detector technologies, the neutrino physics landscape is rapidly expanding. As neutrino oscillation experiments enter the intensity and precision frontiers, neutrino–nucleus interaction measurements are providing crucial input. MINERvA is an experiment at Fermilab dedicated to the study of neutrino–nucleus interactions in the regime of incident neutrino energies from one to few GeV. The experiment recorded neutrino and antineutrino scattering data with the NuMI beamline from 2009 to 2019 using the Low-Energy and Medium-Energy beams that peak at 3GeV and 6GeV, respectively. This article reviews the broad spectrum of interesting nuclear and particle physics that MINERvA investigations have illuminated. The newfound, detailed knowledge of neutrino interactions with nuclear targets thereby obtained is proving essential to continued progress in the neutrino physics sector.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Measurement of inclusive charged-current νμ scattering on hydrocarbon at «eν »∼6 GeV with low three-momentum transfer(American Physical Society, 2022-08-01)The $\mathrm{MINER}\ensuremath{\nu}\mathrm{A}$ experiment reports double-differential cross-section measurements for ${\ensuremath{\nu}}_{\ensuremath{\mu}}$-carbon interactions with three-momentum transfer $|\stackrel{\ensuremath{\rightarrow}}{q}|<1.2\text{ }\text{ }\mathrm{GeV}$ obtained with medium energy exposures in the NuMI beam. These measurements are performed as a function of the three-momentum transfer and an energy transfer estimator called the available energy defined as the energy that would be visible in the detector. The double-differential cross sections are compared to the genie and nuwro predictions along with the modified version of genie which incorporates new models for better agreement with earlier measurements from $\mathrm{MINER}\ensuremath{\nu}\mathrm{A}$. In these measurements, the quasielastic, resonance, and multinucleon knockout processes appear at different kinematics in this two-dimensional space. The results can be used to improve models for neutrino interactions needed by neutrino oscillation experiments.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Vertex finding in neutrino-nucleus interaction: a model architecture comparison(Institute of Physics, 2022-08-01)We compare different neural network architectures for machine learning algorithms designed to identify the neutrino interaction vertex position in the MINERvA detector. The architectures developed and optimized by hand are compared with the architectures developed in an automated way using the package “Multi-node Evolutionary Neural Networks for Deep Learning” (MENNDL), developed at Oak Ridge National Laboratory. While the domain-expert hand-tuned network was the best performer, the differences were negligible and the auto-generated networks performed as well. There is always a trade-off between human, and computer resources for network optimization and this work suggests that automated optimization, assuming resources are available, provides a compelling way to save significant expert time. - 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 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Measurement of electron neutrino and antineutrino cross sections at low momentum transfer(American Physical Society, 2024-05-01)Accelerator based neutrino oscillation experiments seek to measure the relative number of electron and muon (anti)neutrinos at different L/E values. However high statistics studies of neutrino interactions are almost exclusively measured using muon (anti)neutrinos since the dominant flavor of neutrinos produced by accelerator based beams are of the muon type. This work reports new measurements of electron (anti)neutrinos interactions in hydrocarbon, obtained by strongly suppressing backgrounds initiated by muon flavor (anti)neutrinos. Double differential cross sections as a function of visible energy transfer, Eavail, and transverse momentum transfer, pT, or three momentum transfer, q3 are presented. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simultaneous Measurement of Muon Neutrino νμ Charged-Current Single π+ Production in CH, C, H2O, Fe, and Pb Targets in MINERvA(American Physical Society, 2023-07-07)Neutrino-induced charged-current single π+ production in the Δ(1232) resonance region is of considerable interest to accelerator-based neutrino oscillation experiments. In this Letter, high statistic differential cross sections are reported for the semiexclusive reaction νμA→μ-π++ nucleon(s) on scintillator, carbon, water, iron, and lead targets recorded by MINERvA using a wideband νμ beam with Eν ≈6 GeV. Suppression of the cross section at low Q2 and enhancement of low Tπ are observed in both light and heavy nuclear targets compared with phenomenological models used in current neutrino interaction generators. The cross sections per nucleon for iron and lead compared with CH across the kinematic variables probed are 0.8 and 0.5 respectively, a scaling which is also not predicted by current generators. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simultaneous Measurement of νμ Quasielasticlike Cross Sections on CH, C, H2O, Fe, and Pb as a Function of Muon Kinematics at MINERvA(American Physical Society, 2023-04-21)This Letter presents the first simultaneous measurement of the quasielasticlike neutrino-nucleus cross sections on C, water, Fe, Pb, and scintillator (hydrocarbon or CH) as a function of longitudinal and transverse muon momentum. The ratio of cross sections per nucleon between Pb and CH is always above unity and has a characteristic shape as a function of transverse muon momentum that evolves slowly as a function of longitudinal muon momentum. The ratio is constant versus longitudinal momentum within uncertainties above a longitudinal momentum of 4.5 GeV/c. The cross section ratios to CH for C, water, and Fe remain roughly constant with increasing longitudinal momentum, and the ratios between water or C to CH do not have any significant deviation from unity. Both the overall cross section level and the shape for Pb and Fe as a function of transverse muon momentum are not reproduced by current neutrino event generators. These measurements provide a direct test of nuclear effects in quasielasticlike interactions, which are major contributors to long-baseline neutrino oscillation data samples. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Neutrino-Induced Coherent π+ Production in C, CH, Fe, and Pb at ⟨Eν⟩ ∼ 6 GeV(American Physical Society, 2023-08-04)MINERvA has measured the νμ-induced coherent π+ cross section simultaneously in hydrocarbon (CH), graphite (C), iron (Fe), and lead (Pb) targets using neutrinos from 2 to 20 GeV. The measurements exceed the predictions of the Rein-Sehgal and Berger-Sehgal PCAC based models at multi-GeV νμ energies and at produced π+ energies and angles, Eπ>1 GeV and θπ<10°. Measurements of the cross-section ratios of Fe and Pb relative to CH reveal the effective A scaling to increase from an approximate A1/3 scaling at few GeV to an A2/3 scaling for Eν>10 GeV. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Measurement of the Multineutron ν̄μ Charged Current Differential Cross Section at Low Available Energy on Hydrocarbon(American Physical Society, 2023-12-01)Neutron production in antineutrino interactions can lead to bias in energy reconstruction in neutrino oscillation experiments, but these interactions have rarely been studied. MINERvA previously studied neutron production at an average antineutrino energy of ∼3 GeV in 2016 and found deficiencies in leading models. In this paper, the MINERvA 6 GeV average antineutrino energy dataset is shown to have similar disagreements. A measurement of the cross section for an antineutrino to produce two or more neutrons and have low visible energy is presented as an experiment-independent way to explore neutron production modeling. This cross section disagrees with several leading models' predictions. Neutron modeling techniques from nuclear physics are used to quantify neutron detection uncertainties on this result. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Measurement of the Axial Vector Form Factor from Antineutrino–Proton Scattering(Nature Research, 2023-02-02)Scattering of high energy particles from nucleons probes their structure, as was done in the experiments that established the non-zero size of the proton using electron beams1. The use of charged leptons as scattering probes enables measuring the distribution of electric charges, which is encoded in the vector form factors of the nucleon2. Scattering weakly interacting neutrinos gives the opportunity to measure both vector and axial vector form factors of the nucleon, providing an additional, complementary probe of their structure. The nucleon transition axial form factor, FA, can be measured from neutrino scattering from free nucleons, νμn → μ−p and ν¯ μp→ μ+n, as a function of the negative four-momentum transfer squared (Q2). Up to now, FA(Q2) has been extracted from the bound nucleons in neutrino–deuterium scattering3–9, which requires uncertain nuclear corrections10. Here we report the first high-statistics measurement, to our knowledge, of the ν¯μp→μ+n cross-section from the hydrogen atom, using the plastic scintillator target of the MINERvA11 experiment, extracting FA from free proton targets and measuring the nucleon axial charge radius, rA, to be 0.73 ± 0.17 fm. The antineutrino–hydrogen scattering presented here can access the axial form factor without the need for nuclear theory corrections, and enables direct comparisons with the increasingly precise lattice quantum chromodynamics computations12–15. Finally, the tools developed for this analysis and the result presented are substantial advancements in our capabilities to understand the nucleon structure in the weak sector, and also help the current and future neutrino oscillation experiments16–20 to better constrain neutrino interaction models.