45 research outputs found

    Signal selection and model-independent extraction of the neutrino neutral-current single π + cross section with the T2K experiment

    Get PDF
    This article presents a study of single π + production in neutrino neutral-current interactions (NC1π +) using the FGD1 hydrocarbon target of the ND280 detector of the T2K experiment. We report the largest sample of such events selected by any experiment, providing the first new data for this channel in over four decades and the first using a sub-GeV neutrino flux. The signal selection strategy and its performance are detailed together with validations of a robust cross section extraction methodology. The measured flux-averaged integrated cross-section is σ = (6.07 ± 1.22) × 10−41 cm2 /nucleon, 1.3 σ above the NEUT v5.4.0 expectation

    First differential measurement of the single π+ production cross section in neutrino neutral-current scattering

    Get PDF
    Since its first observation in the 1970s, neutrino-induced neutral-current single positive pion production (NC1π +) has remained an elusive and poorly understood interaction channel. This process is a significant background in neutrino oscillation experiments and studying it further is critical for the physics program of next-generation accelerator-based neutrino oscillation experiments. In this Letter we present the first double-differential cross-section measurement of NC1π + interactions using data from the ND280 detector of the T2K experiment collected in ν-beam mode. The measured flux-averaged integrated cross-section is σ = (6.07±1.22)×10−41 cm2 /nucleon. We compare the results on a hydrocarbon target to the predictions of several neutrino interaction generators and final-state interaction models. While model predictions agree with the differential results, the data shows a weak preference for a cross-section normalization approximately 30% higher than predicted by most models studied in this Letter

    First differential measurement of the single π+ production cross section in neutrino neutral-current scattering

    Get PDF

    First measurement of the electron-neutrino charged-current pion production cross section on carbon with the T2K near detector

    Get PDF

    First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions using an accelerator neutrino beam

    Get PDF

    First measurement of the electron neutrino charged-current pion production cross section on carbon with the T2K near detector

    Get PDF

    First joint oscillation analysis of Super-Kamiokande atmospheric and T2K accelerator neutrino data

    Get PDF

    Serum 25-hydroxyvitamin D concentrations in dogs - correlation with health and cancer risk

    Get PDF
    25‐hydroxyvitamin D (25(OH)D) is important in bone health as well as many diseases including cancer. Supplementation may increase responsiveness of cancer cells to chemotherapy. Serum 25(OH)D, intact parathyroid hormone (iPTH) and canine C‐reactive protein (c‐CRP) were measured in healthy dogs and dogs with haemoabdomen. Regression analysis determined optimal 25(OH)D concentrations. In healthy dogs (n = 282), mean iPTH concentrations correlated inversely (r2 = 0.88, P 150 ng mL−1. Relative risk of cancer increased with decreasing 25(OH)D concentrations [RR = 3.9 for 25(OH)D below 40 ng mL−1 (P = 0.0001)]. Serum 25(OH)D concentrations in dogs vary widely, and are influenced by dietary VitD content. Serum vitD measurement can identify dogs for which supplementation may improve health and response to cancer therapy
    corecore