227 research outputs found
Measurement of the Multi-Neutron Charged Current Differential Cross Section at Low Available Energy on Hydrocarbon
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 data set
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.Comment: 25 pages, 11 figures; Added ancillary files with cross section values
as .csv Matches preprint accepted by publishe
Simultaneous measurement of muon neutrino quasielastic-like cross sections on CH, C, water, Fe, and Pb as a function of muon kinematics at MINERvA
This paper presents the first simultaneous measurement of the
quasielastic-like 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 4.5GeV/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 quasielastic-like interactions, which are major contributors to
long-baseline neutrino oscillation data samples.Comment: 9 pages, 8 flgures, including supplemental materia
Neutrino-induced coherent production in C, CH, Fe and Pb at GeV
MINERvA has measured the -induced coherent 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
energies and at produced energies and angles,
GeV and . Measurements of the cross-section ratios of
Fe and Pb relative to CH reveal the effective -scaling to increase from an
approximate scaling at few GeV to an scaling for
GeV
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