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Creators/Authors contains: "Ratoff, P N"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    We report an improved measurement of the valence u and d quark distributions from the forward-backward asymmetry in the Drell-Yan process using 8.6     fb − 1 of data collected with the D0 detector in p p ¯ collisions at s = 1.96 . This analysis provides the values of new structure parameters that are directly related to the valence up and down quark distributions in the proton. In other experimental results measuring the quark content of the proton, d quark contributions are mixed with those from other quark flavors. In this measurement, the u and d quark contributions are separately extracted by applying a factorization of the QCD and electroweak portions of the forward-backward asymmetry. Published by the American Physical Society2024 
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    Free, publicly-accessible full text available November 1, 2025
  2. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
    The Super-Kamiokande and T2K Collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interaction model for events overlapping in neutrino energy and correlated detector systematic uncertainties between the two datasets, which are found to be compatible. Using 3244.4 days of atmospheric data and a beam exposure of 19.7 ( 16.3 ) × 10 20 protons on target in (anti)neutrino mode, the analysis finds a 1.9 σ exclusion of C P conservation (defined as J C P = 0 ) and a 1.2 σ exclusion of the inverted mass ordering. Published by the American Physical Society2025 
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    Free, publicly-accessible full text available January 1, 2026