353 research outputs found
Differential cross section measurement of charged current interactions without final-state pions in MicroBooNE
In this letter we present the first measurements of an exclusive electron
neutrino cross section with the MicroBooNE experiment using data from the
Booster Neutrino Beamline at Fermilab. These measurements are made for a
selection of charged-current electron neutrinos without final-state pions.
Differential cross sections are extracted in energy and angle with respect to
the beam for the electron and the leading proton. The differential cross
section as a function of proton energy is measured using events with protons
both above and below the visibility threshold. This is done by including a
separate selection of electron neutrino events without reconstructed proton
candidates in addition to those with proton candidates. Results are compared to
the predictions from several modern generators, and we find the data agrees
well with these models. The data shows best agreement, as quantified by
-value, with the generators that predict a lower overall cross section, such
as GENIE v3 and NuWro
First measurement of quasi-elastic baryon production in muon anti-neutrino interactions in the MicroBooNE detector
We present the first measurement of the cross section of Cabibbo-suppressed
baryon production, using data collected with the MicroBooNE detector
when exposed to the neutrinos from the Main Injector beam at the Fermi National
Accelerator Laboratory. The data analyzed correspond to
protons on target of neutrino mode running and protons on
target of anti-neutrino mode running. An automated selection is combined with
hand scanning, with the former identifying five candidate production
events when the signal was unblinded, consistent with the GENIE prediction of
events. Several scanners were employed, selecting between three
and five events, compared with a prediction from a blinded Monte Carlo
simulation study of events. Restricting the phase space to only
include baryons that decay above MicroBooNE's detection thresholds,
we obtain a flux averaged cross section of
cmAr, where statistical and systematic uncertainties are combined
Measurement of neutral current single production on argon with the MicroBooNE detector
We report the first measurement of production in neutral current (NC)
interactions on argon with average neutrino energy of ~GeV. We use
data from the MicroBooNE detector's 85-tonne active volume liquid argon time
projection chamber situated in Fermilab's Booster Neutrino Beam and exposed to
protons on target for this measurement. Measurements of NC
events are reported for two exclusive event topologies without charged
pions. Those include a topology with two photons from the decay of the
and one proton and a topology with two photons and zero protons. Flux-averaged
cross-sections for each exclusive topology and for their semi-inclusive
combination are extracted (efficiency-correcting for two-plus proton final
states), and the results are compared to predictions from the \textsc{genie},
\textsc{neut}, and \textsc{NuWro} neutrino event generators. We measure cross
sections of (syst) (stat), ,
and for the
semi-inclusive NC, exclusive NC+1p, and exclusive NC+0p
processes, respectively.Comment: 16 pages, 14 figures, 2 table
Search for heavy neutral leptons in electron-positron and neutral-pion final states with the MicroBooNE detector
We present the first search for heavy neutral leptons (HNL) decaying into
or final states in a liquid-argon time projection
chamber using data collected with the MicroBooNE detector. The data were
recorded synchronously with the NuMI neutrino beam from Fermilab's Main
Injector corresponding to a total exposure of protons on
target. We set upper limits at the confidence level on the mixing
parameter in the mass ranges MeV for the channel and MeV for
the channel, assuming . These limits represent the most stringent constraints in the
mass range MeV and the first constraints from a direct
search for decays.Comment: Version as accepted by Physical Review Letters, some presentational
changes and updated references, no changes to result
First demonstration of timing resolution in the MicroBooNE liquid argon time projection chamber
MicroBooNE is a neutrino experiment located in the Booster Neutrino Beamline
(BNB) at Fermilab, which collected data from 2015 to 2021. MicroBooNE's liquid
argon time projection chamber (LArTPC) is accompanied by a photon detection
system consisting of 32 photomultiplier tubes used to measure the argon
scintillation light and determine the timing of neutrino interactions. Analysis
techniques combining light signals and reconstructed tracks are applied to
achieve a neutrino interaction time resolution of .
The result obtained allows MicroBooNE to access the ns neutrino pulse structure
of the BNB for the first time. The timing resolution achieved will enable
significant enhancement of cosmic background rejection for all neutrino
analyses. Furthermore, the ns timing resolution opens new avenues to search for
long-lived-particles such as heavy neutral leptons in MicroBooNE, as well as in
future large LArTPC experiments, namely the SBN program and DUNE
First measurement of production in neutrino interactions on argon with MicroBooNE
We present a measurement of production from neutrino interactions on
argon with the MicroBooNE detector. The modeling of resonant neutrino
interactions on argon is a critical aspect of the neutrino oscillation physics
program being carried out by the DUNE and Short Baseline Neutrino programs.
production in neutrino interactions provides a powerful new probe of
resonant interactions, complementary to pion channels, and is particularly
suited to the study of higher-order resonances beyond the . We
measure a flux-integrated cross section for neutrino-induced production
on argon of
/nucleon. By demonstrating the successful
reconstruction of the two photons resulting from production, this
analysis enables a novel calibration technique for electromagnetic showers in
GeV accelerator neutrino experiments
First Measurement of Differential Cross Sections for Muon Neutrino Charged Current Interactions on Argon with a Two-proton Final State in the MicroBooNE Detector
We present the first measurement of differential cross sections for
charged-current muon neutrino interactions on argon with one muon, two protons,
and no pions in the final state. Such interactions leave the target nucleus in
a two-particle two-hole state; these states are of great interest, but
currently there is limited information about their production in
neutrino-nucleus interactions. Detailed investigations of the production of
two-particle two-hole states are vital to support upcoming experiments
exploring the nature of the neutrino, and the development of the liquid-argon
time-projection-chamber has made possible the isolation of such final states.
The opening angle between the two protons, the angle between the total proton
momentum and the muon, and the total transverse momentum of the final state
system are sensitive to the underlying physics processes as embodied in a
variety of models. Realistic initial-state momentum distributions are shown to
be important in reproducing the data.Comment: To be submitted to PR
Measurement of triple-differential inclusive muon-neutrino charged-current cross section on argon with the MicroBooNE detector
We report the first measurement of the differential cross section
for inclusive
muon-neutrino charged-current scattering on argon. This measurement utilizes
data from 6.4 protons on target of exposure collected using the
MicroBooNE liquid argon time projection chamber located along the Fermilab
Booster Neutrino Beam with a mean neutrino energy of approximately 0.8~GeV. The
mapping from reconstructed kinematics to truth quantities, particularly from
reconstructed to true neutrino energy, is validated by comparing the
distribution of reconstructed hadronic energy in data to that of the model
prediction in different muon scattering angle bins after conditional constraint
from the muon momentum distribution in data. The success of this validation
gives confidence that the missing energy in the MicroBooNE detector is
well-modeled in simulation, enabling the unfolding to a triple-differential
measurement over muon momentum, muon scattering angle, and neutrino energy. The
unfolded measurement covers an extensive phase space, providing a wealth of
information useful for future liquid argon time projection chamber experiments
measuring neutrino oscillations. Comparisons against a number of commonly used
model predictions are included and their performance in different parts of the
available phase-space is discussed
The Single-Phase ProtoDUNE Technical Design Report
ProtoDUNE-SP is the single-phase DUNE Far Detector prototype that is under construction and will be operated at the CERN Neutrino Platform (NP) starting in 2018. ProtoDUNE-SP, a crucial part of the DUNE effort towards the construction of the first DUNE 10-kt fiducial mass far detector module (17 kt total LAr mass), is a significant experiment in its own right. With a total liquid argon (LAr) mass of 0.77 kt, it represents the largest monolithic single-phase LArTPC detector to be built to date. It's technical design is given in this report
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