New Measurements of Nucleon Structure Functions from the CCFR/NuTeV Collaboration

TL;DR

This paper presents new, model-independent measurements of nucleon structure functions F_2 and Delta xF_3 from neutrino and antineutrino scattering on iron, providing insights into heavy charm production and resolving previous data discrepancies.

Contribution

First model-independent extraction of Delta xF_3, offering new tests for heavy charm production models and reconciling neutrino and muon scattering data for F_2.

Findings

Delta xF_3 is higher than theoretical predictions.

F_2 measurements agree with NLO PDFs, resolving previous discrepancies.

Results support models with massive charm production schemes.

Abstract

We report on the extraction of the structure functions F_2 and Delta xF_3 = xF_3nu-xF_3nubar from CCFR neutrino-Fe and antineutrino-Fe differential cross sections. The extraction is performed in a physics model independent (PMI) way. This first measurement for Delta xF_3, which is useful in testing models of heavy charm production, is higher than current theoretical predictions. The F_2 (PMI) values measured in neutrino and muon scattering are in good agreement with the predictions of Next to Leading Order PDFs (using massive charm production schemes), thus resolving the long-standing discrepancy between the two sets of data.