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Contribution Poster cross sections

Poster (participating in poster prize competition)

Measurement of muon neutrino CC0pi cross sections on Oxygen and Carbon at the T2K near detector

Authorship annotation

for the T2K collaboration

Session and Location

Wednesday Session, Poster Wall #95 (Auditorium Gallery Left)

Abstract content

A detailed understanding of neutrino(ν)-nucleus interactions is essential for the precise measurement of ν oscillations at long-baseline experiments, such as T2K. Moreover, since T2K utilises a water Cherenkov far detector, the study of ν cross sections on Oxygen is imperative. In this poster we report preliminary results from a measurement of ν-Oxygen and ν-Carbon cross sections and their ratio for interactions without pions in the final state as a function of outgoing muon kinematics. For the first time we combine data from the two Fine-Grained Detectors (FGDs) of the T2K near detector ND280: FGD1 is made of plastic scintillator, whilst FGD2 contains also water. The analysis allows the simultaneous extraction of C and O cross sections via a binned likelihood fit. FGD1 data, constraining FGD2 v-Carbon interactions, helps to reduce statistical errors on v-Oxygen ones. The analysis methods reduce model-dependence as much as possible to allow fruitful comparisons with theoretical models.

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