First measurement of the $\nu_{\mu}$ charged-current cross section without pions in the final state on a water target

TL;DR

This paper presents the first differential measurement of the muon neutrino charged-current cross section on water without pions in the final state, using the T2K off-axis near detector, providing detailed data in muon momentum and angle.

Contribution

It provides the first differential cross section measurement of muon neutrino interactions on water without pions, using the T2K experiment's data, enhancing understanding of neutrino interactions.

Findings

Measured flux-averaged total cross section: (0.95 ± 0.08(stat) ± 0.06(det.syst) ± 0.04(model syst) ± 0.08(flux)) × 10^{-38} cm^2 per nucleon.

First differential measurement in muon momentum and angle bins for this interaction channel.

Provides data crucial for neutrino oscillation experiments and interaction modeling.

Abstract

This paper reports the first differential measurement of the charged-current interaction cross section of $\nu_{\mu}$ on water with no pions in the final state. This flux-averaged measurement has been made using the T2K experiment's off-axis near detector, and is reported in doubly-differential bins of muon momentum and angle. The flux-averaged total cross section in a restricted region of phase space was found to be $ \sigma= (0.95 \pm 0.08 (\mbox{stat}) \pm 0.06 (\mbox{det. syst.}) \pm 0.04(\mbox{model syst.}) \pm{} 0.08(\mbox{flux}) ) \times 10^{-38} \mbox{cm}^2$ per n.