Abstract
We report on the first measurement of flux-integrated single differential cross sections for charged-current (CC) muon neutrino (ν_{μ}) scattering on argon with a muon and a proton in the final state, ^{40}Ar (ν_{μ},μp)X. The measurement was carried out using the Booster Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE liquid argon time projection chamber detector with an exposure of 4.59×10^{19} protons on target. Events are selected to enhance the contribution of CC quasielastic (CCQE) interactions. The data are reported in terms of a total cross section as well as single differential cross sections in final state muon and proton kinematics. We measure the integrated per-nucleus CCQE-like cross section (i.e., for interactions leading to a muon, one proton, and no pions above detection threshold) of (4.93±0.76_{stat}±1.29_{sys})×10^{-38} cm^{2}, in good agreement with theoretical calculations. The single differential cross sections are also in overall good agreement with theoretical predictions, except at very forward muon scattering angles that correspond to low-momentum-transfer events.
Highlights
We report on the first measurement of flux-integrated single differential cross sections for chargedcurrent (CC) muon neutrino scattering on argon with a muon and a proton in the final state, 40Ar ðνμ; μpÞX
The measurement was carried out using the Booster Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE liquid argon time projection chamber detector with an exposure of 4.59 × 1019 protons on target
The data are reported in terms of a total cross section as well as single differential cross sections in final state muon and proton kinematics
Summary
Additional kinematical selections are used to enhance the contribution of CCQE interactions in our CC1p0π sample These include requiring that the measured muon-proton pairs be coplanar (jΔφμ;p − 180°j < 35°) relative to the beam axis, have small missing transverse momentum relative to the beam direction (pT 1⁄4 jp⃗ μT þ p⃗ pTj < 350 MeV=c), and have a. The efficiency for detecting CC1p0π CCQE-like events, out of all generated CC1p0π with an interaction vertex within our fiducial volume, was estimated using our Monte Carlo (MC) simulation and equals ≈20% [23] We note that this efficiency includes acceptance effects, as the typical LArTPC efficiency for reconstructing a contained high-momentum proton or muon track is grater than ∼90% [26].
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