Inclusive η ′ production from the Υ ( 1 S ) Artuso, M.; Boulahouache, C.; Blusk, S. ...
Physical review. D, Particles and fields,
3/2003, Letnik:
67, Številka:
5
Journal Article
We present a measurement of \(\eta\) 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. \(\eta\) 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 \(\Delta(1232)\). We measure a flux-integrated cross section for neutrino-induced \(\eta\) production on argon of \(3.22 \pm 0.84 \; \textrm{(stat.)} \pm 0.86 \; \textrm{(syst.)}\) \(10^{-41}{\textrm{cm}}^{2}\)/nucleon. By demonstrating the successful reconstruction of the two photons resulting from \(\eta\) production, this analysis enables a novel calibration technique for electromagnetic showers in GeV accelerator neutrino experiments.
We report the first double-differential cross section measurement of neutral-current neutral pion (NC\(\pi^0\)) production in neutrino-argon scattering, as well as single-differential measurements of ...the same channel in terms of final states with and without protons. The kinematic variables of interest for these measurements are the \(\pi^0\) momentum and the \(\pi^0\) scattering angle with respect to the neutrino beam. A total of 4971 candidate NC\(\pi^0\) events fully-contained within the MicroBooNE detector are selected using data collected at a mean neutrino energy of \(\sim 0.8\) GeV from \(6.4\times10^{20}\) protons on target from the Booster Neutrino Beam at the Fermi National Accelerator Laboratory. After extensive data-driven model validation to ensure unbiased unfolding, the Wiener-SVD method is used to extract nominal flux-averaged cross sections. The results are compared to predictions from commonly used neutrino event generators, which tend to overpredict the measured NC\(\pi^0\) cross section, especially in the 0.2-0.5 GeV/c \(\pi^0\) momentum range, at forward scattering angles, and when at least one proton is present in the final state. These measurements show sensitivity to a variety of features that complicate the description of NC\(\pi^0\) production including the form factors describing the elementary neutrino interaction and the final state interactions of the outgoing particles in the residual argon nucleus. This data will help improve the modeling of NC\(\pi^0\) production, which represents a major background in measurements of charge-parity violation in the neutrino sector and in searches for new physics beyond the Standard Model.
A detailed understanding of inclusive muon neutrino charged-current interactions on argon is crucial to the study of neutrino oscillations in current and future experiments using liquid argon time ...projection chambers. To that end, we report a comprehensive set of differential cross section measurements for this channel that simultaneously probe the leptonic and hadronic systems by dividing the channel into final states with and without protons. Measurements of the proton kinematics and proton multiplicity of the final state are also presented. For these measurements, we utilize data collected with the MicroBooNE detector from 6.4\(\times10^{20}\) protons on target from the Fermilab Booster Neutrino Beam at a mean neutrino energy of approximately 0.8 GeV. We present in detail the cross section extraction procedure, including the unfolding, and model validation that uses data to model comparisons and the conditional constraint formalism to detect mismodeling that may introduce biases to extracted cross sections that are larger than their uncertainties. The validation exposes insufficiencies in the overall model, motivating the inclusion of an additional data-driven reweighting systematic to ensure the accuracy of the unfolding. The extracted results are compared to a number of event generators and their performance is discussed with a focus on the regions of phase-space that indicate the greatest need for modeling improvements.
PDF