This paper reports the first differential measurement of the charged-current ${\overline{\nu }}_{\mu }$ interaction cross section on water with no pions in the final state. The unfolded flux-averaged measurement using the T2K off-axis near detector is given in double-differential bins of ${\mu }^{+}$ momentum and angle. The integrated cross section in a restricted phase space is $\sigma =(1.11\pm 0.18)\times {10}^{-38}{\mathrm{cm}}^2$ per water molecule. Comparisons with several nuclear models are also presented.

• Received 28 August 2019
• Accepted 24 June 2020

DOI:https://doi.org/10.1103/PhysRevD.102.012007

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society