First Measurement of the Charged Current antinumu 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 muon-antineutrino 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 $\sigma =(1.11\pm 0.18)\times {10E}^{-}{\mathrm{cm}}^2$ per water molecule. Comparisons with several nuclear models are also presented.

• arXiv preprint: https://arxiv.org/abs/1908.10249
• DOI: https://doi.org/10.1103/PhysRevD.102.012007
• Reference: Phys.Rev.D 102 (2020) 1, 012007