First measurement of the charged current <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mi>μ</mml:mi></mml:msub></mml:math> double differential cross section on a water target without pions in the final state

This paper reports the first differential measurement of the charged-current ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}$ 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 ${\ensuremath{\mu}}^{+}$ momentum and angle. The integrated cross section in a restricted phase space is $\ensuremath{\sigma}=(1.11\ifmmode\pm\else\textpm\fi{}0.18)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}38}\text{ }\text{ }{\mathrm{cm}}^{2}$ per water molecule. Comparisons with several nuclear models are also presented.

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