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Measurement of the muon neutrino inclusive charged-current cross section in the energy range of 1-3 GeV with the T2K INGRID detector

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  • T2K Collaboration
Article number072002
<mark>Journal publication date</mark>5/04/2016
<mark>Journal</mark>Physical Review D
Issue number7
Number of pages22
Publication StatusPublished
<mark>Original language</mark>English


We report a measurement of the ν μ-nucleus inclusive charged-current cross section (=σ cc) on iron using data from the INGRID detector exposed to the J-PARC neutrino beam. The detector consists of 14 modules in total, which are spread over a range of off-axis angles from 0° to 1.1°. The variation in the neutrino energy spectrum as a function of the off-axis angle, combined with event topology information, is used to calculate this cross section as a function of neutrino energy. The cross section is measured to be
σ cc (1.1  GeV)=1.10±0.15 (10 −38   cm 2 /nucleon),
σ cc (2.0  GeV)=2.07±0.27 (10 −38   cm 2 /nucleon), and
σ cc (3.3  GeV)=2.29±0.45 (10 −38   cm 2 /nucleon), at energies of 1.1, 2.0, and 3.3 GeV, respectively. These results are consistent with the cross section calculated by the neutrino interaction generators currently used by T2K. More importantly, the method described here opens up a new way to determine the energy dependence of neutrino-nucleus cross sections.