Abstract
We measure neutrino charged-current quasielasticlike scattering on hydrocarbon at high statistics using the wideband Neutrinos at the Main Injector beam with neutrino energy peaked at 6GeV. The double-differential cross section is reported in terms of muon longitudinal (p_{∥}) and transverse (p_{⊥}) momentum. Cross section contours versus lepton momentum components are approximately described by a conventional generator-based simulation, however, discrepancies are observed for transverse momenta above 0.5 GeV/c for longitudinal momentum ranges 3-5 and 9-20 GeV/c. The single differential cross section versus momentum transfer squared (dσ/dQ_{QE}^{2}) is measured over a four-decade range of Q^{2} that extends to 10 GeV^{2}. The cross section turnover and falloff in the Q^{2} range 0.3-10 GeV^{2} is not fully reproduced by generator predictions that rely on dipole form factors. Our measurement probes the axial-vector content of the hadronic current and complements the electromagnetic form factor data obtained using electron-nucleon elastic scattering. These results help oscillation experiments because they probe the importance of various correlations and final-state interaction effects within the nucleus, which have different effects on the visible energy in detectors.
Highlights
We measure neutrino charged-current quasielasticlike scattering on hydrocarbon at high statistics using the wideband Neutrinos at the Main Injector beam with neutrino energy peaked at 6 GeV
In this Letter, we report a study of muon neutrino CCQElike interactions in the Neutrinos at Main Injector (NuMI) [55] “medium energy” beam
We report the differential cross section versus the square of the momentum transferred using a quasielastic interaction hypothesis, where Q2QE 1⁄4 2EνðEμ − pkÞ − M2μ and the neutrino energy Eν is determined using the quasielastic (QE) hypothesis
Summary
The charged-current quasielastic (CCQE) neutrino interaction (i.e., νμn → μ−p) is an important channel in the Eν range of a few GeV and is of value in searches for leptonic CP-symmetry violation [1,2,3,4,5,6]. We report the differential cross section versus the square of the momentum transferred using a quasielastic interaction hypothesis, where Q2QE 1⁄4 2EνðEμ − pkÞ − M2μ and the neutrino energy Eν is determined using the quasielastic (QE) hypothesis (see [54]) This result extends the Q2QE range by a factor of 4 compared to previous measurements. As the signal definition for CCQE-like interactions includes no final-state mesons or heavy baryons, the energy loss profiles of tracks contained within MINERvA are required to be consistent with a proton hypothesis. For events with Q2QE > 0.6 GeV2 the proton-interaction probability is high, so no energy loss cut is made in this region This results in a small discontinuity in the transverse momentum distributions for the muon þ additional track
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